This article is pretty cool! It is about Nasa is using a 3D printer for fabricating Rocket parts. The printer uses metal powder as ingredient. And by laser heating the powder, it form a metal part which shape could be very complex. Personally I doubt the strength, but watch the video and you'll see how it works. http://www.nasa.gov/exploration/systems/sls/selective_melting.html
I believe the guys over at the RCA in London have one of these. They did mention it was NASA grade and has the ability to form Titanium. This was a couple of years ago and things do change! SLM can make working car parts so NASA grade machines are going to be top end.
Airman @Chrispan:I think I go with you on this, but at thesame time they may still subject it to further heat treatment. They may not subject human lives to unnecessary risks.
