Campagnolo Titanium 8sp cassette?

[Sboat]

I acquired a Campagnolo (NOS) Record full titanium 13-23 8speed cassette, with ti-lockring. My problem is the lock ring is too small for the intended hub. Can I use a steel lock ring with the titanium, or should I use an aluminum ring, seeing the titanium ring is probably not going to be any easy item to find.