Yes, you should definitely have an option to Keep Sorted by Title. I'm assuming all of your albums aren't showing that option too. If you go to View > Metadata, are Titles checked for viewing? It shouldn't make a difference in the sort options, and I just tested that in mine, but I wonder if there's a problem with the titles in your album.
I have Titles checked for viewing but unless I've added a Title, it only shows the filename. But even so, I have the option to keep sorted by titles.
Added: for my albums containing some photos with filename only and some with titles, it sorts those without a title first and then alphabetically those with a title. Unfortunately I don't have any albums containing only filenames and no titles to test. Maybe if you add a title to a photo or two in that album, the sort options will change? Just a thought ....