T 0864 (OTTO) Titanium powder, -325 mesh, 99.9% Cas 7440-32-6 - used in pyrotechnics and vacuum engineering. T 0864 (OTTO) Titanium powder, -325 mesh, 99.9% 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.