The inclusion of a title page within a manuscript is largely dependent on the requirements of the publisher or journal that you are submitting your work to. Generally speaking, if a title page is not listed among the submission requirements laid out by the publisher, then it is not necessary to include one in the manuscript.
However, if the publisher does require a title page, then it is important to make sure that you include one. The title page should include the title of the manuscript, your name, and any other contact information that may be required by the publisher.
At the end of the day, it is important to make sure that you are thoroughly familiar with all of the guidelines laid out by the publisher that you are submitting to in order to make sure that your manuscript follows all necessary requirements.