T 1804 (OTTO) Titanium powder, 99%+ Cas 7440-32-6 - used in both aerospace and non-aerospace applications. T 1804 (OTTO) Titanium powder, 99%+ 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.