Almost any thing that serves as a barrier between the two surfaces should work. I ride two Ti bikes year round in all kinds of weather. I've been using Phil Wood grease and have never had a problem.
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A conclusion is the place where you got tired of thinking. - S. Wright
Favorite rides in the stable: Indy Fab CJ Ti - Colnago MXL - S-Works Roubaix - Habanero Team Issue - Jamis Eclipse carbon/831