Your speech title on a written program is the first impression that people have of you. Based on it they will either decide they must hear you, or perhaps attend another session.
The following articles discuss creating speech titles. Which will you read first (or choose to ignore)?
How to Create Sizzling Speech and Book Titles, by Sandra Schrift
The Power of a Great Title, by Dave Curley
How to Title a Public Speech, by Jennifer Eblin