One of the German 3D printers can "print" titanium, which isn't as stiff as steel (e.g., titanium bicycles needed larger tubes to equal the stiffness of steel; this was great under normal riding conditions, but the tubes were so thin you could buckle them with your bare hands). At 04:33 PM 8/31/2012, Bill Gosper wrote:

I wonder if Shapeways can work tungsten, which is surprisingly cheap.