But what you've got there isn't "titanium" - it's an alloy containing titanium - it's probably mostly aluminum, and may contain other metals, too, all of which are on the alkaline side. So don't use anything acidic to clean them. And, while that alloy has wonderful tensile strength (i.e., can withstand tremendous pressure), it's not particularly "hard" - which is why it's relatively light in weight.
Simichrome or Collinite Metal Wax will be excellent nonabrasive cleaning products, though both will probably blacken the alloy initially, but the black stuff, the result of a chemical reaction with the metal, will rub off with hand polishing leaving a lovely shine. For more protection, I recommend Collinite Insulating Wax. I think you can get all these things mail order (or phone order or internet order) from Bob Daniels at Danase Detailing Products Supply, (www.danase.com
). Btw, both Simichrome and Metal Wax will work wonderfully on stainless, nickel, and chrome finishes, but will remove bluing.