He's right you know.
I thought grease did affect carbon fibre, or at least could do.
Someone should google this for me.
Back on the original topic; you will often find an aluminium sleeve in a ti seattube in any case. I always use copaslip to avoid binding, so far so good.
Knew I'd read something somewhere. Can't believe I was forced to google it myself.http://www.bikeradar.com/forums/viewtopic.php?t=12534958
I don't know the truth of the matter.