The URL once given remains the same and all search engine activity will be based on that, so changing will not change the listing of your hub and the same key words in the original title will be used for scrolling. You can change it in the text module but that does not give the benefit you are looking for, if I understood you properly.
If you are not happy with the key words in title and the listings
you could delete the original, keep the content, and publish with a new title. That can solve your problem I think.