The forging page says:
"To forge an item, heat it and cast the enchanting spell (one of hardness/viciousness/accuracy, depending on the upgrade type.) Then heat it some more and cast tempering. Finally, cool it back down to start the cycle over. Other players can explain the process in more detail if you don't want to figure it out for yourself."
I believe it should read
"To forge an item, heat it and cast the enchanting spell (one of hardness/viciousness/accuracy, depending on the upgrade type.). Cool it all the way down then heat it some more and cast tempering. Finally, cool it back down to start the cycle over. Other players can explain the process in more detail if you don't want to figure it out for yourself."