I posted something about this several months ago and got flammed for it. But I think it is helpful, and not many people are aware of it. So, here it goes.

Entitled means to receive or deserve ownership of something. Example: "I am entitled to my fair share."

Titled means to name something. Example: "My book is titled "Things Your Psychic Adviser Never Told You."

So, if you send a query letter to a publisher, use "titled" instead of "entitled" when talking about what your book is called. Chances are, they will know the difference between the two words.