Here's why:
* Titles are generally italicized: When you mention a title of a larger work (book, movie, play, etc.), you italicize it. This applies to speech titles as well.
* Quotations are for direct quotes: Quotation marks are used to indicate a direct quote from a source. They are not used for titles.
Example:
Instead of "The Importance of Education," you would write *The Importance of Education* in your report.