Rescuing a Campagnolo Super Record Titanium Axle

I assume you've read this:

(c) Two types of Super Record titanium bottom brackets were offered:

(1) Type I was a hollow version of NR; bearing races were pressed-on steel (like the Ti SR pedals). An unfortunate incident involving Laurent Fignon, the 1982 Giro, and a bad fall while he was in the lead owing to a broken Ti axle resulted in a redesign:

(2) Type II uses a solid axle with threaded nuts. I've never heard of one of these failing, but the bad PR had already doomed it.

(3) Both versions used CP (commercially pure) titanium; about 1/2 the strength of 6/4--but that's what was available!!
(4) Cups were aluminum with pressed-in steel races.

A good machine shop will be able to take off the pressed-on steel races, remake them in tool steel and press the new ones onto the old axle. You should probably be shopping around at the kind of shops which specialise in restoring vintage sports cars & motorcycles. It will be expensive, so very much a last resort after you've discovered that you can't buy a replacement and for some reason don't want to do the right thing, which is to bin it and fit a steel Nuovo Record BB.