Zenphoto

The titlelink is the URL name of a page/article/category that is automatically generated seo friendly when adding an item. This is basically the equivalent to Zenphoto's album name and image file name and unique to that page/article/category even if using Zenphoto's multilingual mode.
If you don't check the permaTitlelink option the titlelink will be newly generated everytime you change the title of a page/article/category. This can lead to broken links if someone or a search engine links to you. This concept is taken from Wordpress where it is called permalink (or slug). It is referred to that as titlelink in all functions so it is called that that here, too.