Im Confused...

So theres many properties of titanium and niobium that make them super unique. Especially titanium, since it is a very hard metal, you can form it well or texture it effectively. This metal also does not take heat well and connot be soldered. There are a few pieces that I have come across that just dont make sense.

Jose MARÍN's work is a bit confusing. He claims that these pieces below are titaium, but then how did he roll print them? and how did he make domes that are also textured??

Despite my confusion his pieces are pretty awesome:

How Jose How?

Also confusing, this claims to be titanium:

JOSE MARÍN - titanium earrings

Um HOW??