For a metal alloy, which one of the following descriptions relates to the stress-relief annealing process?

• A. Heating the workpiece material above its recrystallization temperature, soaking and then cooling in still air
• B. Heating the workpiece material below its recrystallization temperature, holding for some time and then furnace cooling
• C. Heating the workpiece material up to its recrystallization temperature and then rapid cooling
• D. Heating the workpiece up to its recrystallization temperature and cooling to room temperature alternately for a few cycles