It is depends on what kind of annealing you used. In full annealing, after recrystallization process, it is follow by grains growth, the small grains will be consumed by large grains, then the overall size of grains will be increased, and thus make the steel more ductile, and deformable.
Humidity is known as mass of water vapor/mass of dry air
Hs (saturation) = (Mw/Ma){Ps/(P-Ps)}
P is total pressure
Ps is saturation pressure
what is the derivation for this equation?