Hardness for the annealing-process is listed normally on HRB scale, at the maximum value. this process is performed for refining grain size, improving strength, affecting electromagnetic properties and removing residual stress.  

It is a generalized term. It consists of metal`s heating at a particular temperature & then cooling it down at that particular rate that produces refined microstructure. Cooling rate is normally slow. This technique is often used for softening of metals for cold-working, for improving machinability and for enhancing properties like that of electrical conductivity. […]

Heat treating is a process of heating or cooling metals and is used to alter their properties in order to obtain the desired shape and structure such as brittleness, hardness, and softness. The steps for achieving these things are consistent with all heat treatment processes. Heat treatment techniques include annealing, tempering, hardening, quenching, stress releasing […]