The most common materials include stainless steel (316L, 17-4 PH), titanium (Ti6Al4V), aluminium (AlSi10Mg), tool steel (H13, M300, A2, D2), Inconel 625/718, cobalt chrome, copper, and maraging steel. Material availability depends on the process — DMLS supports the broadest range, DED wire uses standard welding wire feedstock (far cheaper than powder), and BMD offers metal-specific rods for stainless, tool steel, and copper. Phillips can advise on the optimal material-process combination for your application.