Consider we have an iron piece. If we could somehow tap on the iron with our finger for a very long long time, I mean millions of years, would it ever be able to make a dent?
True but I remember reading something about iron being able to resist infinite cycles of deformation if they are small enough. It was on the topic of elastic limit.
Infinite for all practical purposes, not actually infinite.
On extremely long timescales, the iron will sublimate atom by atom if nothing else destroys it before.