For the small things, I tend to use the aluminium oxide grinding rotary bit (the pink stone), which is just coarse enough for steel (which I've used on The Honey Badger). For Titanium, I'd possibly experiment with the same bit, using a coarser bit of it is required. I've not worked with Titanium but I understand the sparks can be hazardous to health so the usual precaution of a face mask and eye protection.