Ferrotitanium is an iron alloy composed mainly of titanium and iron. According to the different titanium content, there are three main varieties: FeTi30 (containing Ti25.0% -35.0%, Al<8.5%, Si<5.0%), FeTi40 (containing Ti35.0% -45.0%, Al<9.5%, Si<4.0%), and FeTi70 (containing Ti65% -75%, A10.5% -5%, Si<0.5%). In addition, there are various titanium containing composite alloys such as Ti Si Fe, Ti B Al V, Ti B Al Cr, Ti Al, Ni Ti Al, Ti B Al, Ti Cr Al, etc., used as titanium additives.