Many folks believe that carbon fiber degrades over time, as the resin component of the matrix gets brittle with age.

But it's hard to prove this (real world conditions vary widely), especially since each company may use a slightly different resin recipe.

One thing I know for sure: if the Ti Serotta has a 1" steerer, you're going to have a hard time finding a replacement CF fork that isn't as old as the one you already have.