3-D printing has been around for awhile in some form. FDM, fuse deposition modeling, using different plastics is very popular for proto-typing and proof of concept. However, it’s a long way from production capabilities. Two reasons; speed and tolerance requirements. Not to say they won’t get there for low volume applications, but the speed and accuracy required for high volume is a long way off. My guess (didn’t see it in the article) is there was some form of post processing required to meet the dimensional requirements. Cool stuff, though. And titanium no less!
Seems I really wasn’t so far off. How about.....rocket engines?