Ferrotitanium is a ferroalloy, an alloy of iron and titanium with between 10–20% iron and 45–75% titanium and sometimes a small amount of carbon. It is used in steelmaking as a cleansing agent for iron and steel; the titanium is highly reactive with sulfur, carbon, oxygen, and nitrogen, forming insoluble compounds and sequestering them in slag, and is therefore used for deoxidizing, and sometimes for desulfurization and denitrogenation. In steelmaking, the addition of titanium yields metal with finer grain structure.

Steel manufacturing plants make use of FeTi alloy as stabilizers for the prevention of formation of chromium carbide at the grain boundaries. This can improve malleability in carbon steels, thereby increasing its versatility. It also serves the manufacture of low carbon steel for producing steel sheets. Foundries use FeTi for the fusing the molten metal with titanium to impart excellent strength and quality to it without interfering with other ratio