In a web site, there should always be a Meta Tag for the title of every page because some people are defined by the title of what your site is all about. Why are we doing this? Because of so much information we process in our mind, we have to categorize it by associating the content in a quick referencing way. For the method of a search engine, when it already crawls the page it tells what the page is supposed to be about.
This is the reason why creating the title in the page is critical to rank well on major search engines. In getting the title, just always keep the reader in mind first, it is because a reader may never enter that phrase and for that you will lose the targeted traffic you were trying to reach. Sometimes the phrases work out well for both the user and search engine in that case, success is easily achieved.