Investor Presentation March 2021

AsTernium of IMarch March 2021 8, 2021 1 Forward-Looking Statements

This presentation contains certain forward-looking statements and information relating to Ternium S.A. and its subsidiaries (collectively, “Ternium”) that are based on the current beliefs of its management as well as assumptions made by and information currently available to Ternium. Such statements reflect the current views of Ternium with respect to future events and are subject to certain risks, uncertainties and assumptions. Many factors could cause the actual results, performance or achievements of Ternium to be materially different from any future results, performance or achievements that may be expressed or implied by such forward-looking statements, including, among others, changes in general economic, political conditions in the countries in which Ternium does business or other countries which have an impact on Ternium’s business activities and investments, changes in interest rates, changes in inflation rates, changes in exchange rates, the degree of growth and the number of consumers in the markets in which Ternium operates and sells its products, changes in steel demand and prices, changes in raw material and energy prices or difficulties in acquiring raw materials or energy supply cut-offs, changes in business strategy and various other factors. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described herein as anticipated, believed, estimated, expected or targeted. Ternium does not intend, and does not assume any obligation, to update these forward-looking statements.

Ternium I March 2021 2 Profile

Ternium I March 2021 3 Ternium’s Profile A leading steel company in Latin America

20,000 . Net sales of $8.7 billion in 2020 Countries Employees . Steel shipments in 2020 of 11.4 million tons . Industrial facilities in , , , 24 Integrated Distribution IntegratedFacilities , USA and Central America Centers Facilities

Steel Shipments 2020 22 12 Service Downstream Facilities Other; 5% (Slabs 4%) Centers Mexico; 52% Colombia; 4% . Vertically integrated, from iron ore mines to USA; 14% (Slabs 9%) service centers Other Markets 31% . Focus on high value-added products Brazil; 8% (Slabs 8%) . Participation in Usiminas1 control group Southern Region; 17%

1Usiminas: a leading company in the Brazilian flat steel market

Ternium I March 2021 4 Sustainable Profitability A comprehensive approach to value creation

. Quest for excellence in industrial management Economic Value Generated and Distributed (2020) and technology . Focus on differentiation through sophisticated Suppliers $6.4 B products and services Community Employees investments $739 M . Proactive approach to environment, health and $11.1 M safety Economic . Recruitment, training, and retention of talent value generated Research & $8.2 B Capex . Strengthening of steel value chain development $8.3 M $560 M . Deep ties with our communities . Commitment to integrity Capital Taxes providers $436 M $47 M

Ternium I March 2021 5 Sustainable Profitability Delivering Ternium’s business strategy

. Focus on high-margin value-added products Production capacity (million tons per year) Crude steel Hot-rolled steel . Pursue strategic growth opportunities +47% 15.7 +68% . Implement Ternium’s best practices 12.4 12.4 10.3 10.8 . Maximize the benefits arising from Ternium’s 7.3 distribution network . Enhance Ternium’s position as a competitive steel producer 2016 2019 2021f

. Quest for excellence in industrial management and Dividend Payments ($ per ADS) 1 2.10 technology

1.20 1.00 1.10

-

2017 2018 2019 2020 2021 1 Proposed by the Board of Directors on February 23th, 2021 Ternium I March 2021 6 Sustainable Profitability Improving our health and safety performance

. Occupational health and safety (OH&S) policy Lost time injury frequency rate (# of events / million hours worked) . Standardized and certified OH&S management system 1.1 1.0 . Safety-focused capital expenditure plan 0.7 0.7 0.8

. Integral program for critical steel production 1 2015 2016 2017 2018 2019 processes and iron ore tailings dams 1 The 2019 LTIFR increase reflected mainly the effect of construction works carried out for the new facility in Mexico and Colombia . Management tours at the facilities, training, workshops and conferences to raise awareness . Extensive communication to engage and commit Ternium's and contractor's employees . Initiatives to promote healthy and safe operations in the steel industry value chain

Ternium I March 2021 7 Sustainable Profitability Health and safety measures against Covid-19

. Work-from-home policy whenever possible . New protocols for on-site work that comply with, or exceed, local authorities’ directives . strict social distancing and mandatory face masks . temperature checks at admission posts . strengthened disinfection routines including buses, working posts and cafeterias . Employees with higher risk of developing complications stay at home . Prompt testing of all individuals showing symptoms along with their close contacts and contagion tracking . Extensive communication program to promote health and wellness protocols at both work and home

Ternium I March 2021 8 Sustainable Profitability Roadmap to decabornization

. Target of 20% reduction of CO2 emissions Emission Intensity CO2 (tons emitted per ton of steel produced) intensity (scope 1 and 2) by 2030 (base 2018) by: 3.5 11.00 12.0 . intensifying the use of renewable energy 10.70 10.30 3.0 . increasing scrap in the metallic mix 10.0 2.5 . augmenting carbon capture capacity 6.70 8.0 2.0 6.00 6.0 . partially replacing met coal with charcoal 1.5 4.0 . prioritizing lower specific-emission 1.0 technologies 0.5 2.0 0.0 0.0 . Board of Directors quarterly oversight of Ternium’s 2015 2016 2017 2018 2019 Climate Change strategy Scope 3: raw materials upstream Scope 2: energy upstream Scope 1: direct Steel production

The increased emission intensity in 2017 reflected the incorporation of the Rio de Janeiro unit (blast furnace-based) in Ternium's crude steel production mix.

Ternium I March 2021 9 Sustainable Profitability Minimizing Ternium’s environmental footprint

. New environmental investment plan: . encompassing Ternium’s steel making facilities in Mexico, Brazil and Argentina . seven-year duration and $460 million capex . Responsible use of natural resources . Focus on excellence in environmental performance . Certified environmental management system . Management performance accountability Project of the Rewilding Argentina Foundation at the Iberá Wetlands . Sustainable building solutions at new facilities . Biodiversity protection

Investments to improve the capture and treatment of air emissions Ternium I March 2021 10 Sustainable Profitability Strengthening Ternium's value chain

. Promoting a collaborative network to foster excellence in performance: . Universities . Business schools . Government agencies . Industrial associations . Helping 1,800 SMEs, customers and suppliers, grow: “ProPymes has helped create an industrial network . Training programs that encourages the professionalization and quest . Industrial projects and business consultancy for excellence of SMEs.” . Institutional initiatives . Commercial support and financial assistance

Ternium I March 2021 11 Sustainable Profitability Helping our communities thrive

. Fostering education: . Ternium’s technical school in Pesquería . Refurbishing of community schools . Special education program for children . Financial support to high-school, undergraduate and graduate students . Supporting initiatives that strengthen our communities: Roberto Rocca Technical School in Pesquería, Mexico . Funding of health care infrastructure and equipment . Sponsorship of diverse cultural exhibitions and events . Arrangement of city races and other sport activities . Special funding program: $5.5 million to help our communities launched at the COVID-19 outbreak

Volunteer programs for school repair Ternium I March 2021 12 Sustainable Profitability Special funding program to help our communities

. Construction and operation of a field hospital in Monterrey, Mexico . 100 beds . 10 fully-equipped units for intensive care (IC) . Equipment donation to 14 hospitals and health-care units in 4 countries (ventilators, units for IC, beds, IC equipment and protection gear) . Creation of a professional network to share COVID-19 treatments . Linking doctors from our communities with Humanitas’1 colleagues . Humanitas expertise available at a public virtual campus . Adaptation to online learning at some of Ternium’s education programs . Roberto Rocca Technical School . AfterSchool program . Food support for vulnerable families

1 Humanitas: an Italian network of hospitals controlled by the Techint Group Ternium I March 2021 13 Sustainable Profitability Commitment to integrity through strong corporate governance

. Audit committee (all independent directors) . Internal Audit Department reporting to the Chairman and the Audit Committee . Business Conduct Compliance Officer reporting to the CEO . Compliance department that oversees SOX certifications, related party transactions and

conflict minerals Codes Policies Procedures . Employee accountability and training to ensure a Conduct (for Business conduct Disclouse (relevant wc employees) information) transparent behavior Transparency Conduct for Anti-fraud Related party . Confidential channels to report non-compliant suppliers Securities trading transactions behavior Ethics for senior Diversity Conflict mineral

financial officers Human rights disclosure

Ternium I March 2021 14 Latin American Steel Markets

Ternium I March 2021 15 Latin America Steel Markets Ternium has a leading position in the Mexican steel market

. The Mexican market is the largest in Latin America . Growth in Mexico’s steel consumption over the last decades was driven mainly by a dynamic manufacturing industry . Mexico, Brazil, Argentina and Colombia accounted for approximately 80% of Latin America’s steel consumption in 2020

Apparent steel use (million tons)

Brasil Argentina Mexico Colombia 21.3 20.0 3.3 2.7 2.8

9.7 6.6 1.1

1990 2000 2010 2020f 1990 2000 2010 2020f

Source: Alacero October 2020 Ternium I March 2021 16 Mexico Attractive steel market with a significant demand for high-end steel products

. Developed industrial sector (approximately 49% of shipments in Mexico) . Access to the North American steel market through Steel shipments by industry (2020e) USMCA . Ternium’s focus on value added products and services: Automotive; 23% . Service center network Other industries 9% . Nationwide coverage through distribution centers and regional distributors White goods; 8% . Customer digital connectivity . Ongoing investment plan to increase our capabilities HVAC / lighting; 9% for industrial customers Commercial; 51%

Ternium I March 2021 17 Mexico New hot-rolling mill in Pesquería expected to start up by mid-2021

. Significant technological upgrade to expand TX’s Apparent flat steel use – Mexico 2020 product range and improve customer service Industrial Commercial Local Imports . The new mill will further increase Ternium’s 63% capabilities to substitute imports, which in 2020 56% 44% accounted for 56% of Mexico’s flat steel use 37%

. Targeting the automotive industry, as well as the 0 white goods, machinery, energy and construction sectors . Annual production capacity of 4.4 million tons (option to increase capacity to 4.8 million tons) 36%

Source: Canacero / Ternium estimates Ternium I March 2021 18 Mexico Developing our industrial center in Pesquería

. Greenfield facility inaugurated in 2013 with cold-rolling and galvanizing lines . Additional hot-dipped galvanizing and painting lines inaugurated in 2019 with the most advanced painting technology in Mexico . New hot-rolling mill to start-up in mid-2021 . High-end value-added products for the automotive, white goods and heating-ventilation-air conditioning (HVAC) industries . Expected annual production capacity in 2021: . Hot-Rolling: 4.4 million tons . Cold-rolling: 1.6 million tons

. Hot-dipped galvanizing: 830,000 tons 36% . Painting: 120,000 tons

Ternium I March 2021 19 Argentina Third largest steel market in Latin America with a developed industrial sector

. Significant industrial customer base representing 46% of steel shipments in Argentina Steel shipments by industry (2020e) . Focus on value added products and services: . Service center network . Short notice delivery and just-in-time agreements Commercial 54% Automotive 7% . Customer digital connectivity Agribusiness 9%

. Joint product research and development projects White goods 6% with our value chain (mainly white goods, Canning 8% transportation and renewable energy) Oil & gas 1%

Other industrial 15%

Ternium I March 2021 20 Colombia New rebar mill in Colombia inaugurated in November 2020

. Colombian steel market is the fourth largest in Latin America . Imports account for a significant share of long steel consumption . Ternium to expand its participation in the construction sector in the north/northwest of Colombia . Approximately 50% of steel rebar consumption . No local production . Expensive logistics from the mills in central Colombia . New greenfield rebar facility . Annual capacity of 520,000 tons . Total investment of $90 million

Ternium I March 2021 21 Ternium’s Performance

Ternium I March 2021 22 Ternium’s Performance EBITDA and Net Income

EBITDA ($ million) EBITDA Margin (% of net sales) 645

25%

353 17% 302 263 13% 13% 224 12%

4Q19 1Q20 2Q20 3Q20 4Q20 4Q19 1Q20 2Q20 3Q20 4Q20

EBITDA per Ton1 ($) Net Income and Earnings per ADS Net Income (Loss) ($ million) Earnings (Losses) per ADS 210 671 680 630 580 530 124 480 430 0.36 (0.06) 0.22 0.74 3.06 90 101 91 380 330 280 230 173 180 130 90 80 44 30 -20 4Q19 1Q20 2Q20 3Q20 4Q20 (19) 1 Consolidated EBITDA divided by steel shipments. 4Q19 1Q20 2Q20 3Q20 4Q20

Ternium I March 2021 23 Ternium’s Performance Steel Shipments

Mexico (thousand tons) Other Markets (thousand tons) 1,650 1,643 Slabs 1,544 14% 1,445 1,175 969 889 931 -10% 853 771 636 578 664 519 499

4Q19 1Q20 2Q20 3Q20 4Q20 4Q19 1Q20 2Q20 3Q20 4Q20

Southern Region (thousand tons) Steel Shipments 4Q20

Mexico 54% Other 2% (1% slabs) Colombia 4%

19% 653 USA 8% (5% slabs) 484 547 380 344 Other Markets 25% Brazil 10% (slabs) 4Q19 1Q20 2Q20 3Q20 4Q20 Southern Region 21% Ternium I March 2021 24 Ternium’s Performance Total Shipments and Revenue per Ton

Total Shipments (thousand tons) Revenue per Ton ($/ton)

900 8% 3,067 Mexico 841 2,917 2,998 2,845 2,449 776 769 14% 825 725 737 13% 751 737 727 Consolidated 690 600 4Q19 1Q20 2Q20 3Q20 4Q20 4Q19 1Q20 2Q20 3Q20 4Q20

Net Sales ($ million) Net sales in 4Q20 up 21% sequentially and 15% year-over- year on higher shipments and revenue per ton:

21% 2,580 . Mexico: shipments fully recovered from the pandemic. 2,250 2,271 2,139 Lagged reset of contract prices prevented realized prices 1,746 to increase more in 4Q20. . Southern Region: shipments surpassed pre-pandemic levels by a wide margin on increased demand for durable goods and construction materials in Argentina. 4Q19 1Q20 2Q20 3Q20 4Q20 . Other Markets: lower finished steel shipments and relatively stable slab shipments to third-parties. Ternium I March 2021 25 Ternium’s Performance EBITDA and Net Income

Consolidated Shipments (million tons) Ebitda ($ million) and Ebitda Margin (% of net sales) 24% 13.0 12.5 21% 11.6 -9% 11.4 20% 2,698 9.8 17% 15% 1,931 1,549 1,526 1,525

2016 2017 2018 2019 2020 2016 2017 2018 2019 2020 EBITDA per Ton1 ($) Net Income and Earnings per ADS Net Income ($ million) 208 Earnings per ADS 1,662 159 167 134 122 1,023 868 707 630 3.03 4.51 7.67 2.87 3.97

2016 2017 2018 2019 2020 2016 2017 2018 2019 4Q202020 1 Consolidated EBITDA divided by steel shipments.

Ternium I March 2021 26 Ternium’s Performance Cash Flow and Balance Sheet

Cash from Operations ($ million) Working Capital ($ million) 306 504 182 443 460 154 141 393 355

(275)

4Q19 1Q20 2Q20 3Q20 4Q20 4Q19 1Q20 2Q20 3Q20 4Q20

Free Cash Flow ($ million) Capital Expenditures ($ million)

393 389

307 234 258 185

85 111 120 71

4Q19 1Q20 2Q20 3Q20 4Q20 4Q19 1Q20 2Q20 3Q20 4Q20

Ternium I March 2021 27 Ternium’s Performance Cash Flow and Balance Sheet

Free Cash Flow ($ million) Capital Expenditures ($ million) 1,219 1,201 1,052

664 595 520 560 435 409

(26) 2016 2017 2018 2019 2020 2016 2017 2018 2019 2020 Dividends Payments ($ per ADS) Net Debt ($ billion) 2 2.10 2.7

1.7 1.20 1.5 1.00 1.10 0.9 0.4 0.6x 1.4x 0.6x 1.0x 0.2x1 - Dec-16 Dec-17 Dec-18 Dec-19 Dec-20 2017 2018 2019 2020 2021 1 Net Debt/EBITDA Ratio (last 12 months EBITDA) 2 Proposed by the Board of Directors on February 23th, 2021

Ternium I March 2021 28 Conclusion

Ternium I March 2021 29 Conclusion

. A leading steel company in Latin America with a comprehensive management approach . Successful implementation of business strategy geared toward sustainable profitable growth . Solid financial position . Resilience in times of crisis . New hot-rolling mill in Mexico provides opportunity to strengthen business in the region . Continued focus on generating long-term stakeholder value

Ternium I March 2021 30 Ternium I March 2021 31 Appendix

. Corporate Structure . Production Capacity . Shipments and Net Sales . Income Statement . Cash Flow Statement . Balance Sheet . Selected Webcast Presentation Slide Fourth Quarter and Full Year 2020 . Ternium’s Debt Profile . More about Ternium’s developing industrial system in Brasil

Ternium I March 2021 32 Corporate Structure

Techint Group: 62% : 11% Subsidiaries Joint operations Ternium (treasury shares): 2% Non-consolidated companies Public: 24%

71% 100% 50% Ternium México 29% Las Encinas Peña Colorada 62% 38% Ternium Argentina3 Other 50% Corp: 19% 4% ArcelorMittal 17% TenarisConfab: 3% CEU: 3% Economic participation CSN: 18% 100% 4 Ternium Brasil 2 Other: 37% Direct Indirect Total 51% 49% Ternium Mexico 71% 18% 89% Tenigal Nippon Steel Corp Ternium Argentina3 62% 62% 100% 4 Ternium Colombia Ternium Brasil 100% 100% Usiminas1 17% 2% 19% 100% Ternium del Atlántico Tenigal 51% 51% Ternium Colombia 100% 100% 100% Ternium USA TX Int. 100% 100% 100% TX USA 100% 100% Ternium Int. Guatemala Las Encinas 71% 18% 89% Peña Colorada 36% 9% 44% 48% 30% 1 Techgen Tecpetrol Participation based on total shares distributed 22% 2 Net of non-controlling interest in TX Argentina 50% 3 Formerly known as Siderar 50% Exiros Tenaris 4 Formerly known as CSA

Ternium I March 2021 33 Production Capacity

Production Capacity as of year-end 2019 (million metric tons per year)

Mexico Argentina Other (1) Total

Slabs 2.5 3.2 5.0 (2) 10.7 Billets 1.6 0.2 1.9 Crude steel 4.1 3.2 5.2 12.4 Hot rolled coils 6.5 2.9 9.4 Rebars & wire rods 1.2 0.2 1.4 Cold rolled coils 3.7 1.8 5.5 Tinplated products 0.2 0.2 Galvanized products 2.4 0.6 0.4 3.4 Pre-painted products 0.8 0.1 0.2 1.1 Service center 3.9 2.3 1.3 7.5

(1) Brazil, Southern US, Colombia and Central America (2) Corresponds to Ternium Brasil Ternium I March 2021 34 Shipments and Net Sales

Net Sales (USD million) Shipments (thousand tons) Revenue / ton (USD / ton) 3 4Q2020 3Q2020 Dif. 4Q2020 3Q2020 Dif. 4Q2020 3Q2020 Dif. Q Mexico 1,382.2 1,065.7 30% 1,643 1,445 14% 841 737 14% Southern Region 632.7 495.6 28% 653 547 20% 968 906 7% Other Markets 516.9 508.0 2% 771 853 -10% 671 596 13% Total steel products 2,531.8 2,069.4 22% 3,067 2,845 8% 825 727 13% Other products1 45.5 45.6 0% Total steel segment 2,577.3 2,114.9 22% Total mining segment 105.7 91.3 16% 943 869 8% 112 105 7% Total steel and mining segments 2,683.0 2,206.2 22% Intersegment eliminations (103.3) (67.6) Total net sales 2,579.7 2,138.6 21%

Net Sales (USD million) Shipments (thousand tons) Revenue / ton (USD / ton) 3 2020 2019 Dif. 2020 2019 Dif. 2020 2019 Dif. Q Mexico 4,568.3 5,326.7 -14% 5,913 6,305 -6% 773 845 -9% Southern Region 1,761.9 1,696.6 4% 1,924 1,938 -1% 916 875 5% Other Markets 2,171.6 2,866.7 -24% 3,523 4,268 -17% 616 672 -8% Total steel products 8,501.8 9,890.1 -14% 11,360 12,511 -9% 748 790 -5% Other products1 177.7 296.1 -40% Total steel segment 8,679.5 10,186.2 -15% Total mining segment 390.5 364.0 7% 3,797 3,576 6% 103 102 1% Total steel and mining segments 9,070.1 10,550.2 -14% Intersegment eliminations (334.6) (357.4) Total net sales 8,735.4 10,192.8 -14% 1 The item “Other products” primarily includes Ternium Brasil’s and Ternium México’s electricity sales.

Ternium I March 2021 35 Income Statement

$ million 4Q2020 4Q2019 2020 2019 (Unaudited) Net sales 2,579.7 2,250.0 8,735.4 10,192.8 Cost of sales (1,914.1) (1,943.3) (7,099.9) (8,452.4) Gross profit 665.6 306.7 1,635.5 1,740.4 Selling, general and administrative expenses (196.7) (222.9) (762.9) (897.5) Other operating income (expenses), net 208.3 8.5 206.8 21.7 Operating income 677.2 92.2 1,079.5 864.6

Finance expense (7.8) (21.5) (46.6) (88.3) Finance income 18.5 7.8 49.4 29.1 Other financial income (expenses) income, net (66.2) (16.3) 19.6 (39.8) Equity in (losses) earnings of non-consolidated companies 57.9 23.9 57.6 61.0 Profit before income tax expense 679.7 86.1 1,159.4 826.6 Income tax income (expense) (9.0) 3.8 (291.5) (196.5) Profit for the period 670.6 89.9 867.9 630.0

Attributable to: Owners of the parent 600.4 70.5 778.5 564.3 Non-controlling interest 70.2 19.5 89.4 65.8 Profit for the period 670.6 89.9 867.9 630.0

Ternium I March 2021 36 Cash Flow Statement

$ million 4Q 2020 4Q 2019 2020 2019 (Unaudited) Profit for the period 670.6 89.8 867.9 629.9 Adjustments for: Depreciation and amortization 154.0 170.8 631.1 661.1 Equity in earnings of non-consolidated companies (57.9) (23.9) (57.6) (61.0) Changes in provisions (185.1) 0.7 (185.4) (1.5) Net foreign exchange results and others 107.0 22.1 78.9 51.7 Interest accruals less payments 2.4 0.4 7.0 3.4 Income tax accruals less payments (60.9) (21.2) 66.6 (208.8) Changes in working capital (275.3) 154.0 352.8 572.7

Net cash provided by operating activities 354.9 392.7 1,761.2 1,647.4

Capital expenditures (120.5) (307.4) (560.0) (1,052.3) Proceeds from the sale of property, plant & equipment 0.7 0.3 1.0 0.8 Acquisition of non-controling interest (2.9) (1.6) (17.0) (5.8) Loans to non-consolidated companies - - - 24.5 Decrease in other investments (190.3) 2.7 (600.9) (163.8)

Net cash used in investing activities (313.0) (306.1) (1,176.9) (1,196.6)

Dividends paid in cash to company's shareholders - - - (235.6) Dividends paid in cash to non-controlling interest - - - (28.5) Finance Lease Payments (11.7) (9.9) (42.1) (38.6) Proceeds from borrowings 1.3 396.8 245.7 1,529.8 Repayments of borrowings (151.6) (575.6) (709.8) (1,377.6)

Net cash used in financing activities (162.0) (188.7) (506.3) (150.5)

(Decrease) increase in cash and cash equivalents (120.1) (102.1) 78.1 300.4

Ternium I March 2021 37 Balance Sheet

December 31, December 31, December 31, December 31, $ million $ million 2020 2019 2020 2019

Property, plant and equipment, net 6,504.7 6,539.6 Capital and reserves attributable to the owners of the parent 7,286.1 6,611.7 Intangible assets, net 908.6 943.8 Non-controlling interest 1,157.0 1,103.2 Investments in non-consolidated companies 471.3 513.6 Total Equity 8,443.2 7,714.9 Deferred tax assets 158.7 163.5 Provisions 80.6 613.4 Receivables, net 243.3 592.6 Deferred tax liabilities 346.5 403.3 Trade receivables, net - 0.9 Other investments 2.9 3.3 Other liabilities 551.9 507.6 Total non-current assets 8,289.5 8,757.3 Trade payables 1.1 1.2 Derivative financial instruments 0.5 0.0 Receivables, net 288.6 334.7 Lease liabilities 251.6 298.2 Derivative financial instruments 1.6 1.2 Borrowings 1,327.3 1,628.9 Inventories, net 2,001.8 2,158.3 Total non-current liabilities 2,559.5 3,452.5 Trade receivables, net 918.4 949.7 Other investments 813.5 212.3 Current income tax liabilities 110.5 47.1 Cash and cash equivalents 537.9 520.0 Other liabilities 249.8 240.9 Total current assets 4,561.8 4,176.1 Trade payables 1,049.3 876.8 Derivative financial instruments 5.8 3.0 Non-current assets classified as held for sale 5.0 2.1 Lease liabilities 42.5 40.5 Borrowings 395.6 559.8 Total assets 12,856.2 12,935.5 Total current liabilities 1,853.6 1,768.1 Total liabilities 4,413.1 5,220.7 Total equity and liabilities 12,856.2 12,935.5

Ternium I March 2021 38 Fourth Quarter and FY 2020 Results- Webcast Presentation EBITDA and Net Results

301 . Higher revenue per ton in the 4Q20, reflecting a strong pricing environment. (39) (10) $) 40 . Increased shipment volumes, fully recovering from

645 million the impact of the COVID-19 pandemic. ( 353 . Slight increase in cost per ton. EBITDA…EBITDA Shipments Price/Mix Cost Other EBITDAEBITDA… 3Q20 4Q20

. Better operating income, including a non-recurring 476 45 18 derecognition of a contingency related to tax (42)

benefits in Brasil ($186 million). $) . Better results from Ternium’s investment in

671 million

Usiminas. ( . Net positive effect of higher deferred tax gains and higher foreign exchange losses stemming from a 173

Net Income Operating Net Financial Income Tax Net Income 13% appreciation of the MXN against the USD. Net Income3Q20 OperatingIncome Net FinancialResults Equity in Income Net Income4Q20 3Q20 Income Results Earnings of Tax 4Q20 non-consolidated Companies Ternium I March 2021 39 Ternium Brasil Acquisition A strong foundation for Ternium’s next phase of development

. Acquired in September 2017 . 5 mtpy high-end slab facility in Brazil . Further integrate Ternium Brasil to take it to its full potential . Increase competitiveness in the high-end Mexican steel market vis-à-vis imports . Improve customer service supported by higher operational flexibility . Customized steel products . Coordinated product development . Enhanced logistics

Ternium I March 2021 40 Debt Profile Comfortable maturity schedule

. $1.7 billion gross debt as of 2021 Debt maturity profile 2020 ($/million)

. Main outstanding syndicated loans: Tx Mexico Synd. Loan Tx Investments Synd. Loan . Ternium Mexico: $500 million Tx Brasil Synd. Loan Other outstanding long-term debt Revolving credit facilities . Ternium Brasil: $500 million 663 . Ternium Investments S.à.r.l.: $400 million 525 396 . Other outstanding long-term debt:

. Tenigal: $63 million 138 . Peña Colorada: $59 million 9 . Revolving credit facilities (uncommitted) of $208 2021 2022 2023 2024 2025 million outstanding, mainly in Colombia and Mexico

Ternium I March 2021 41 www.ternium.com

Ternium I March 2021 42