... quality & widely usage 3,multi model for choice Titanium tube--round tube:1.material:Gr1,Gr2,Gr3,Gr4,Gr5,GR7,GR9,GR11 ... ,Ti3AL2.5v,is used mostly in the golf clubs and bicycle girders.Alloy Gr12,it has the similar properties with the ... in advanced quality and resonable price ,welcome any inquiries! Titanium tube--round tube