Using Work/Movement in Title Tag

[Alandbush]

How about

Remove the AliasTags content

TagFormat
Title.displayFormat={$work$movement^^^ - }

This will use the work and movement tag values if present, otherwise default to title.

Nb - I use something similar but also including the movement number

Nbb- I also remove the track number when a movement number is present to prevent both appearing in classical pieces as follows.

tagValue
TrackNumber.replace={MovementNumber}


Edit
You may also like to know how I defined the index for Classical works. It may help you define your Work index.

tagFormat
ClassicalWorks.indexFormat={$WorkComposer^$Work^ - $WorkNumber^, }

ClassicalWorks is a defined index tag, but crucially does not exist on any audio tracks.
The Work... tags on the other hand, do exist as tags with appropriate values.