I'm slightly allergic to nickel so I have to give it up to titanium as the coolest metal. Even though it's been around for awhile, and there have been big advances in aluminum and magnesium and all their alloys, titanium still stands out. It has a nice look to the bare metal that gives it a softer appearance if that's the right term. Whenever I hear it, I think of space age materials, stealth jets, and race cars. It was supposed to be the material of today!!! What happened?!