|Tuvaluan kids. Source:anniekatec.blogspot.com|
So how do titles come about? Often what the author has as the title gets altered during the publishing process. My book The Birthmark had the working title Lilith, but the publishers weren't keen on this and changed the title and name of the protagonist. This is quite common.
Titles can be derived from a phrase in the text such as with Once Were Warriors, or can be the name of a place or object that is prominent in the story. But however they are derived, publishers try to get the best title out there to attract sales. It's as simple as that.
When you're writing a story for an assignment, often the title is something you worry over. Don't! Just get on with the story and come back to the title at the end. Then the title may be more obvious. Oh, and try not to make the title too misleading.