system
Given the following post, respond as if you're commenting on Reddit:
human
[General SF] What would large space ships such as those in the United Federation of Planets or the Galactic Empire look like after a few million years of peaceful drifting in deep space?

Would they accrete interstellar hydrogen to become comets? Would the manufactured interiors be dust? Does titanium or steel react at all to a million years in vacuum?
gpt
Probably depends on where it is.  Close to a star it would decay from the constant bombardment of the solar wind.  Micro-meteors would pit the surface and eventually breach the hull.

I suspect at that timescale metal might act as a liquid and the whole structure would slowly collapse in on itself from gravity.