[Hot Tabasco]

titanium wheels squeaking,

Too many PHD engineers and scientists working at NASA. They should have hired a neighborhood mechanic to grease the wheel bearings....

[LibWhacker]

Hahaha, I know you were kidding. But for the sake of a few others on FR, the squeaking sound isn’t coming from ungreased wheel bearings, but from the noise of sharp, hard metal rolling over the shards of a zillion asteroids, etc., that have accumulated on the planet’s surface the last few billion years.

[rightwingcrazy]

To deal with the low atmospheric temperature and pressure, you might use something like this, but then you'd still have to be concerned with abrasion and maybe corrosion from all that dust. Better off putting up with a little squeaking, maybe.