I think that your title should reflect the main ideas you are seeking to develop in your character analysis. From the outset, I think that asking yourself what exactly it is about Cory that strikes you as meaningful will be a good start. In my mind, I think that what I find intriguing about Cory is that he represents a spirit of hope in many respects. He is the spirit of hope in terms of breaking the cycle of father and son antipathy that is a part of the family heritage. The ending at Troy's funeral when he forgives his father and is able to share in the singing of Troy's favorite song would be a part of this. At the same time, I think that Cory is breaking the cycle of broken dreams in being able to pursue what he wishes in his life as a Marine. It might not be his dream of playing football, but he has broken the cycle of being disappointed by life that Troy endured and suffered through. I think that the scene in which he leaves might be an example of this. In my mind, a good title to indicate this would be "Breaking the Cycle" or something along these lines to convey what it is that Cory does to make his life more meaningful than those who preceded him.