Ouch ! That's dodgy territory
There are a number of things that can be said and done here. The first is that you can simply try
tapping it straight again with a hammer on an anvil or similar flat surface. this will result in one of two things happeng.. you will either get a starightened knife tip, OR it will snap clean off.
If it were mine and it straightened out I would want to know how well heat treated the blade was to start with. I'd want to test it with my hardness testing files at least to make sure it wasn't a bit too soft to take and hold a good edge if it was malleable anough to withstand being bent and straightened that way.
If the tip snaps off it can always be re-ground so that you'd hardly ever know it happened. It needs doing with care, but it can be done.
Heating the tip to make it workable in order to prevent snapping is NOT an option unless you plan on stripping the handle off and re-heat treating the whole blade again afterwards. This can be done, but is far more hassle than a re-grind and re-shape should it snap off trying to straighten it cold.