Quote Originally Posted by moritz
What kind of titanium is best to use in bolted armor?

6-6-2 or 8-1-1, or some other alloy???

What kind do builders prefer to use?
6AL-4V is probably the most widely available alpha/beta alloy and is one of the strongest - that's your best bet. 6-6-2 is another alpha/beta alloy with slightly higher hardness and tensile strength, though lower fracture toughness.

6AL-4V would be best by a long way for your outer armour - I'm using a fully welded 6-4 shell on my spinner with 6-6-2 top and bottom plates (which aren't so likely to take massive impacts). Take a peek at my thread in the build diaries section if you want.