Since 1955, The Department of Defense has referred to Titanium Bars and Forgings as AMS-T-9047 / MIL-T-9047. This specification tends to cause a lot of confusion for Tier 1 Aerospace Manufacturers and OEMs because it covers 20 different types of titanium, and several conditions within some of the alloys. The MIL-T-9047 specification was cancelled in 1999 to move over to the widely used AMS specifications.