Had a seat post shim in a fully, and did not creak at all hence the "abuse".
Turned out that the aluminum frame and the steel shim bonded really nice. Not sure about Titanium chemistry tho.
That's what I'm most afraid of TBH :) I don't want anything bonding to anything and Ti loves that stuff. Looks like there are some options, so I'm sort of chill now.
But what if it creaks? I'd prefer to return my current and brand new seatpost while it's returnable.