No need to worry about the strength of stick tangs. 9, of 10 swords have stick tangs, and a sword has to take way more punishment than any knife. If you use epoxy, and peen the end, you have all the strength you will ever need, and then some. Anneal from just behind the guard position. It will be fine. Another point to ponder, is that Randall Knives made a reputation using stick tangs. If you are using a simple steel, such as a 10XX type, quench point in first, and stop at the guard area. Then you won't have to anneal. Ah, if you are using that saw steel, you probably will need to anneal at least the area you want to peen.