You can change the title of the book to whatever you want. But you have limited control over how calibre use the titles to set the filenames. Characters are replaced and the title may be truncated and an id added.
I would strongly recommend that you don't go there. But there is nothing to stop you from experimenting. Try to change the titles and try to figure out how the filenames change. I don't think it will work, but why not try it?