I don't think the last part is necessarily what we want to emphasize, anyway. If you have a title like "Principia Mathematica/Part 1", you want to emphasize the first part of the title more, surely. Having the name of the work in small print and the section in large print seems backwards to me.
This really depends. Books normally have the book title in small print in the corner with the chapter title in bigger print in the centre of the page at the beginning of each chapter. Not a great example I know. I've written a (very rough and ready) javascript to demonstrate how title would look under my proposal here:
http://en.wikisource.org/wiki/User:Blue-Haired_Lawyer/hierarchy.js