Of titanium and tungsten, do they break, how durable are they, and do they conduct electricity?

Question

A friend is a mechanic wanting to buy a durable wedding ring. He is reluctant because he does not know if they conduct electricity.

Answer 1

Both are metals, so they both break and conduct electricity.  Tungsten is almost always supplied in sintered, rather than cast, form due to its high melting point; thus, tungsten is more brittle than titanium.  Tungsten and titanium are both pretty hard metals, and are reasonably stable to oxidation.  I know rings have been made of titanium, and I would not be surprised if tungsten rings exist as well.