No. The main welding methods of titanium alloy are argon arc welding, laser welding, electron beam welding and plasma arc welding. If the necklace is made of titanium alloy and is not welded, it is not excluded that it is made of other metals or alloys. Titanium alloy necklace is the first ornament made of titanium alloy, including pure titanium, titanium alloy, titanium steel, titanium wire and titanium chain. The advantages of titanium alloy are high strength, low density, corrosion resistance, good biocompatibility and innocuity to human body, but the disadvantages are difficult to process, high cost and easy to scratch or scratch the surface.