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