TMZ has learned one of Tiger Woods' alleged mistresses is going public with his text messages to her, as well as other revealing items, proclaiming, "It's time to tell the truth about Tiger."


We're told porn star Joslyn James will release a ton of stuff at 11 AM ET -- including scores of never-before-seen text messages from Tiger -- on the website www.sextingjoslynjames.com. 

Joslyn acquired the domain name two weeks ago.