Rigga the latest are printing in metals such as alloys or inconels
The considerable dimensions of the system are 4415 x 3070 x 4500 mm (W x H x D) and it requires peripheral equipment that includes a sieving station and powder silo. Printing materials at launch are Aluminium alloy (AlSi10Mg), Titanium alloy and Nickel based alloy (Inconel 718) with others currently under development.
Supersized Industrial 3D Printing in Metal - 3D Printing Industry
I can now design and order stuff in plastic for models at a pittance, imagine what can be done 10 years down the line. For good OR bad.
Just look at what you can do or get made now, modellers are starting to use them as I said.
Art 3D Printed by Shapeways