WHAT can be ANNEALED?
Lots of materials, models and systems.
Very famous - Kirkpatrick's transposition of spinglass groundstate search to chip design length of wire minimization.
Very exotic - multimirror telescopes - based on analogy between SOS models/Ising interfaces and the telescopes, e.g.
at left Ribak/Adler/Lipson (1989); also Paykin/Yacobi/Adler/Ribak from CCP2014 in Boston and PRE, 2016.
Very, very helpful - advice from Kirkpatrick on scheduling
involvement of telescope mirrors in stages.
Very mathematical - theorems about cooling rates; not helpful to actually solve problems.