Mexico expansion outruns Brazil import pain
- Ternium sells mostly steel products, with 2025 net sales of $15.6 billion.
- The Pesqueria cold rolling mill and galvanizing line are running ahead of plan and expected near full capacity by October 2026.
- Mexico is helping the bull case with domestic steel rules for public purchases and 35% tariffs on non-FTA steel.
- Brazil is the main pressure point, after steel imports rose around 30% in Q1 before antidumping measures took effect.
- Usiminas adds scale, but it also brought a $405 million non-cash tax asset write-down in 2025.
Mexico leads the story
Ternium is a steel company, so it will always be tied to steel prices, factory demand, construction, and trade rules. The current bull case is more specific: Mexico is becoming a stronger base for high-end flat steel. The new Pesqueria cold rolling mill and galvanizing line are ahead of schedule, and management expects them close to full capacity by October 2026.
That matters because these lines make higher-value steel used by industries like autos and appliances. Mexico has also agreed to prioritize domestic steel in public purchases. Together with 35% tariffs on non-FTA steel, this could help Ternium replace imports and serve nearshoring demand.
The bear case sits mostly in Brazil. Imports jumped around 30% in Q1, and pressure has spread beyond China to South Korea and Vietnam. Ternium is choosing value over volume there, which means it would rather protect price and margin than chase every ton of sales.
This is not a clean growth story. The stock depends on whether Mexico ramps on time, Brazil inventories normalize in H2, and USMCA plus Section 232 talks do not hurt cross-border auto supply chains. The setup is balanced rather than cheap at any price.
Steel, scale, and timing
Ternium makes money by producing and selling steel. Its main products are flat steel items like hot-rolled, cold-rolled, galvanized, and coated steel. Customers use these in autos, appliances, machinery, construction, packaging, and energy.
The company tries to improve profits by moving deeper into higher-value processing. Pesqueria is the clearest example. Ternium already added downstream lines there, and it is building a slab plant with electric-arc-furnace and direct reduced iron facilities. The filing says the new slab mill is expected by year-end 2026, while management has also framed startup as late 2026 or early 2027.
Brazil adds another layer. Ternium increased its participation in the Usiminas control group from 51.5% to 83.1% in February 2026. That gives Ternium more control in a large market, but Brazil is also where low-priced imports are hurting local steel makers.
Costs matter as much as volume. Ternium is using a $300 million cost efficiency program to protect margins, and it has invested in lower energy costs, including a wind farm in Argentina. Even so, steel remains cyclical. When prices fall or imports flood a market, profits can move fast.
What Ternium sells
Hot-rolled steel
This is a core flat steel product used in pipes, auto parts, gas cylinders, construction, trucks, rail cars, and farm machinery. It also feeds colder and coated products.
Cold-rolled steel
Cold-rolled steel is used in autos, appliances, capital goods, drums, distributors, and service centers. The new Pesqueria cold rolling mill is central to the Mexico growth plan.
Galvanized and coated steel
These products add protective coatings to steel for autos, construction, appliances, energy, and packaging. Pesqueria's galvanizing line is expected close to full capacity by October 2026.
Slabs and other semi-finished steel
Slabs are the basic steel blocks used to make hot-rolled flat products. The new Pesqueria slab plant should help Ternium meet USMCA melted and poured rules.
Iron ore
The mining segment sells iron ore lumps, concentrates, and pellets. Some supply goes to Ternium's own steel plants, while third-party sales are much smaller than the steel business.
Electrical steelmaking process
Ternium secured a U.S. patent for a new electrical steelmaking process to produce exposed steel at scale. This is an option on better production capability, not the main earnings driver today.
Two reported segments
The mix uses 2025 net sales from Ternium's 2025 Form 20-F. Steel dominates reported sales, while Mining is small on a consolidated basis because intercompany mining sales are eliminated.
What could break
Brazil imports stay too high
High impact · High oddsBrazil is the biggest near-term problem. Q1 imports rose around 30% versus the prior quarter, and management said pressure now includes South Korea and Vietnam, not only China. If antidumping measures do not cut imports, Usiminas may keep losing volume or price power.
USMCA and Section 232 drag on
High impact · Medium oddsTernium's Mexico plan depends on regional manufacturing and cross-border supply chains. Long talks around the USMCA review and Section 232 tariffs could slow customer orders, especially in autos. Management expects the process to take time.
Pesqueria execution slips
Medium impact · Medium oddsThe downstream Pesqueria lines are ahead of plan, but the full project still includes a slab plant. Earlier updates raised the total expansion budget to $4 billion after construction inflation and moved the upstream timeline to late 2026. A delay would push out the import substitution benefit.
Steel prices fall faster than costs
High impact · Medium oddsTernium's filing says steel prices are volatile and tied to supply, imports, construction, autos, appliances, and machinery. In 2025, steel revenue per ton fell 10% and steel segment net sales fell 13%. A cost program helps, but it cannot fully offset a deep pricing cycle.
Argentina recovery stays uneven
Medium impact · Medium oddsArgentina is improving from a weak base, but the recovery is not broad. Mining, energy, and agriculture are better, while construction remains soft. Currency controls and financial market swings can also affect Ternium Argentina's cash and investments.
In one breath
What does Ternium do?
Ternium makes steel, mostly flat steel products used by factories and builders. Its largest markets are Mexico, Brazil, and Argentina.
Why is Pesqueria important for Ternium?
Pesqueria is Ternium's big Mexico expansion. The new cold rolling and galvanizing lines make higher-value steel, and the future slab plant should help serve regional auto and industrial supply chains.
What is the biggest risk for TX stock?
Brazil import pressure is the clearest near-term risk. If cheap imports keep rising, Ternium may have to give up volume or accept weaker margins at Usiminas.
Is Ternium mainly a Mexico company?
Mexico is the main growth market, but Ternium is not only Mexico. It also has major operations in Brazil, Argentina, and other Latin American markets.