... usage 3,multi model for choice Titanium tube--round tube:1.material:Gr1,Gr2,Gr3,Gr4,Gr5,GR7,GR9 ... because of its comprehensivemechanicl,physical and chemical properties.Alloy Gr7,add little palladium in cp Titanium and ... it has the most excellent corrosion-resistence Alloy Gr9,Ti3AL2.5v,is used mostly in the ... golf clubs and bicycle girders.Alloy Gr12,it has the similar properties with ...