Like most people these days I use a lot of titanium in my knives. Especially folders that are screwed together. This means wholes that must be drilled and tapped. Small screws and small taps. And when these taps break as they are want to do; it is almost always just so you can't grab the little ***** and turn them out. Two things I learned help this situation greatly: first is I drill my wholes in titanium oversize ( not much but bigger than in steels ) as the wholes seem to close up a little when you are done drilling--- second is when they break soak the piece in Muratic acid. It will eat away at the tap but not the titanium. WORD of CAUTION-- do this outside if possible cause this stuff will put a coat of rust on everything in your shop for 20 feet around! If it's metal it will have rust! But it does work.