In the Marketo Landing Page Designer, you can give your page a title by following the steps in this Community article:
http://community.marketo.com/MarketoArticle?id=kA050000000L9DtCAKHowever, if the template used by the landing page specifies a title, this title will be used instead of the one given to the landing page by the user. My ideas is to allow the landing page to use a title supplied in the template, but if the user gives the landing page a different title, then the landing page is given this title instead.