How is Sir Bradley Wiggins 3D printing his titanium handlebars?
This is how. An engineer explains:


                
            

Basically, it's a layering process. Layer by layer, the 3D printer lays down a thin sheet of powdered titanium and a laser melts and fuses that titanium where the part needs to be. It starts at the bottom and works up. When it's all done, you simply remove the unfused titanium and voila, a new part emerges.