Today I spent 4+ hours at one of the local universities, looking at their 3D printing. They invested in the facility for some other research that they are doing but only use around 5% of their capacity for that so use the 'excess' for prototyping and technology demonstrator work. It is loaded with titanium powder and while that can be changed it is a long and labourious job to do so.
While I was there they were making up a small bracket (think two crosses with separators between them at the corners, around 60x60x40) so I watched the process as they stepped through it. That part will take around 7 hours to make. After that it needs to be annealed to relieve the stresses from manufacture, so it is not a fast process.
The process is simple - zap layers of powder with a laser to fuse it together but as titanium powder will ignite in the presence of oxygen there are all sorts of handling procedures to be observed. Several times during the day we had to go and sit for 15 to 30 minutes while the units vented to remove the oxygen below 1% levels (they operate in an argon environment). Particle size is a maximum of 45 micron.
Because of the commercial nature of their work I could not take pictures of what was being done (and not all that exciting really) but here are three from their show and tell cabinet.

First are 3 cubes; the largest is around 30mm, the small one to the right is around 5mm per side. Made of tetrahedral elements, you can see through them from the right direction.
Next is a bolt and nut, made as one piece (the nut goes up and down the thread). Around 40mm high. The top hex head is a lattice arrangement and has a logo inside as well as another logo on top.
Last is a cut away jet engine, also made as one piece. Roughly 75mm long.