We are OEM manufacturer for titanium blade, barb, shaft--- process titanium blade and knife, shaft, barb, and other titanium products for diving, the blade is made by beta titanium alloy and 6al-4v titanium alloy material, it is never stainless in sea water, and it is nonmagnetic and light very much. The hardness hrc45-50. It is titanium alloy material, it is very light.