Consider the following titles (for a grant proposal):

• Classification of log del Pezzo Surfaces with no more than four non-Gorenstein Singularies.
• A Proof of the Riemann Hypothesis.

However, as titles of grant proposals, they are likely to be too myopic or "microscopic".  Unlike theses or papers, which are very well focused, a grant proposal should offer perspectives.  It should explain:

• the importance of the proposed research,
• how it fits in with the work of other researchers,
• the proposer's own point of view and new ideas.

A grant proposal may include:

• conjectures of how certain particular proofs (speaking of pure mathematics research proposals) might proceed.
• a variety of proposed problems of varying difficulties; classify them into short-term, medium-term and long-term projects.
• an outline of your mathematical research in the next few years.