... : main raw material to make metal titanium, also used to make titanium steel. Titanium sponge1) TG-TV gradeSpec: Ti 97%min, ... Fe 2.0%max, Mg 0.5%max, Si 0.1%max, C ... 06%max, Si 0.02%max, Cl 0.06%, C 0.02%max, N 0.02%max, O 0. ... 10%max, Si 0.03%max, Cl 0.08%, C 0.03%max, N 0.02%max, O 0. ... 15%max, Si 0.03%max, Cl 0.10%, C 0.03%max, N 0.03%max, O 0. ...