... material to make metal titanium, also used to make Ti steel. 1).Titanium sponge TG-TV grade Ti:97%min, Fe:2 ... .06%max, H:0.005% 3).Grade 1 Ti:99.6%min, Fe:0.10%max,Si:0 ... .07%max, H:0.005% 4).Grade 2 Ti:99.5%min, Fe:0.15%max,Si:0 ... .07%max, H:0.005% 5).Grade 3 Ti:99.3%min, Fe:0.20%max,Si:0 ... .08%max, H:0.010% 6).Grade 4 Ti:99.1%min, Fe:0.30%max,Si:0 ... .09%max, H:0.012%. 7).Grade 5 Ti:98.5%min, Fe:0.40%max,Si:0 ...