The Title Page object is a "print" only object, and represents the title page of a printed document. When you include this object in a book, the printed document includes a title page.
The TitlePage element represents an Author-it Title Page object, and contains all of its properties.
<TitlePage>
+ <Object>
<PrintFile>527</PrintFile>
<PrintIncludeByLine inherited="true">true</PrintIncludeByLine>
<PrintIncludeSubTitle>true</PrintIncludeSubTitle>
<PrintIncludeSuperTitle inherited="true">true</PrintIncludeSuperTitle>
<PrintIncludeTitle inherited="true">true</PrintIncludeTitle>
<PrintIncludeVersion inherited="true">true</PrintIncludeVersion>
<PrintMedia inherited="true">32</PrintMedia>
</TitlePage>