How to rename titles in multiple folders independently in the "Title" column to: title serial number/total number of titles in the album + title name. For example, with 3 titles in the album: 1/3. xxx, 2/3. yyy, 3/3. zzz. In individual folders, I currently use this format string: %track%/%_total_files%. %title%.
If the data you want to put into TITLE is not there already (e.g. stored in TRACK) - there is no way to reset a counter when the folder name changes. This feature is only available in the track numbering wizard.