What could be the title of a power point presentation for a PostDoc Interview?
I would use a somewhat standard talk title. If you're presenting primarily the results of a single paper, I don't know that it would be a problem to use the title of the paper as the title of the presentation.

For reference, the titles of some of my interview talks:


Adventures in Modeling for Policy
Harnessing the Counterfactual
Hospital Infection Control: Integrating Mathematical and Observational Epidemiology


All of these seemed to go over just fine.