The title and the thesis statement are two different parts of an essay.
The title of an essay should give the reader a hint of the essay's contents and should also grab the reader's attention. The title is generally brief. For example, if you were asked to write an essay about the purpose of the three witches in the play, Macbeth, and you are exploring whether or not the witches are real or a figment of Macbeth's imagination, a catchy title might be: Witches or Wishes? If you were asked to write an argumentative essay about the necessity of schools promoting extracurricular activities a title might be: Education and Extracurricular Activities: Ingredients for Success.
On the other hand, a thesis of an essay makes a claim or takes a stand. The thesis controls the essay by presenting the argument. As well, the thesis is placed in the introductory paragraph. A strong thesis is controlled and specific, generally one sentence. For example, using the above example about extracurricular activities, a strong thesis might be: Extracurricular activities in schools are essential to promote a student's physical and social well being. This essay could then explore the positive physical aspect of activities such as sports and cheerleading as well as the positive social aspects of these, such as team building. Other activities such as band or yearbook would also add to a discussion of meeting challenges and making friends.
In summary, the title names the essay, and the thesis controls the essay.