T 0911 (OTTO) Titanium powder, -325 mesh, 99.5% Cas 7440-32-6 - used in steel as an alloying element (ferro-titanium) to reduce grain size and as a deoxidizer, and in stainless steel to reduce carbon content. T 0911 (OTTO) Titanium powder, -325 mesh, 99.5% Cas 7440-32-6 - used for aircraft fuselage and engine parts.