So I want to tap a super small hole on grade 5 titanium alloy with M1.8x0.2 (which should be possible according to this Quora's answer. But is there any tap available for me to do this job? I mean M1.8 with grade 5 titanium, the normal tap should break very easily. Since it's a super small hole with super tough material.
Also, can it be done by normal CNC, like the one you'll find in a normal company? Since the document looks like some scientific research which might be using some advanced machines. And can it be done on CNC engraving and milling machine or it needs a CNC lathe?
Last, why you should tap titanium with CNC but not by hand?