Ternium SA engages in the production of flat steel. The firm produces finished and semi-finished steel products and iron ore, which are sold either directly to steel manufacturers, steel processors or end users. The firm operates through two segments: Steel and Mining. The Steel segment includes the sales of steel products, and the Mining segment includes the sales of iron ore products, which are primarily inter-company. The Steel segment comprises three operating segments: Mexico, the Southern Region, and Other Markets. In the steel segment, steel products include slabs, billets, and round bars (steel in its basic, semi-finished state), hot-rolled coils and sheets, bars and stirrups, wire rods, cold-rolled coils and sheets, tin plate, hot dipped galvanized and electrogalvanized sheets and pre-painted sheets, steel pipes and tubular products, beams, roll-formed products, and other products. In the mining segment, iron ore is sold as concentrates (fines) and pellets.