I've seen luthiers separate a body and neck by heating a thin putty knife and sliding it in and gingerly scraping it out. Adding a little bit of water and using a heat gun. I suppose a hair dryer would work. I think also it was hide glue, not titebond. Fortunatly, I only own bolt on necks, so this glue thing is not a problem.
It was at cage basses in SOHO. Great place. If you're ever in New York, check it out.