I would highly recomend Titanium Era (link has been posted already in thread).
The missus and I both have rings from them and I also have a Ti necklace, the quality is very good.
Also check out Allergy Matters (http://www.allergymatters.com/) they have various Ti jewellery and no import duty.
The Boccia brand stuff is good - the missus has earrings from them.
Why Ti?
Hypoallergenic - Especially good for earrings, even better than gold.
Doesn't tarnish (well hardly) - No green gunk.
Techy/Sport coolness - all the best kit has Ti
Gold jewellery on a man is often a bit questionable (IMO...!)
Practicaly all Ti products are alloys, pure Ti is a relatively soft metal.
A Titanium ring CAN be cut off in an emergency, it is hard but not indestructable.
I am sure Titanium Era have lots more useful info as their site was well done.
And in answer to the original question - No, no idea where in Munich to get them. While looking for ours a few places had 1 or 2 but no real choice. This was a few years back and this sort of thing is not so unusual anymore.