I scrap chronologically so many of mine don't have title pages. HOwever, when I start a new trip or event I put a title page in, whether it is in the front of a new book or in the middle of a book.
"Italy" was a title page for a new book, "Pompeii" was a title page in the middle of a book but it was about 20 pages long.
If something important is in my books that is several pages long, it usually gets a title page on the right hand side before it starts.
When we take a crusie, all fo the ports with lots of pictures gets a title page.