Originally Posted by DS Motorsport

You can also cut the first 1-2mm off the tip as soon as it starts to wear, round off.
This will give you a brand new tip and just takes a few seconds with the Dremel.

Personally I replace my 1,5 and 2,0 tip every year because I wrench a lot and almost all my screws are Ti and Alu. Don't want to risk stripping a screw on raceday when I'm in a hurry.
I really like the TiNi tips from Arrowmax.