The closest would probably be glass on a bed of mercury. Differences in rate of cooling leads to uneven stresses and minute bends. Similarly while handling and

The closest would probably be glass on a bed of mercury. Differences in rate of cooling leads to uneven stresses and minute bends. Similarly while handling and working the surface plates you need to let them reach thermal equilibrium. Large forgings which need to be machined to close tolerances are left to sit even for months in room temperature to reach thermal equilibrium.