Printing with aluminum and titanium can also be dangerous. https://www.osha.gov/pls/oshaweb/owa...SES&p_id=26019

Powdered titanium is used in pyrotechnics and is quite explosive. Not ideal for a home operation. That's why any jewelry store selling those alloys will not size them. They typically offer exchange plans instead so you can swap them out if you need a different size. Putting a torch to a titanium ring is a major no-no.

Plus, most metal printers I've seen (the relatively affordable, non-aerospace metal printers) produce items will appalling surface quality. Lots of post-processing work.