Great information Ira, I had missed that and thought perhaps you had solved the problem.However, while you can assign a title to an image in Photos on OS X, the title is apparently only seen when you open the "get info" window for that image either in Finder or Photos on OS X.
I also see the title in Photos on OS X when viewing a screenful of images in an album or "All Photos" or any other Photo application sidebar locations where the photo shows up.
