Is this the field TITLE or the filename?
If it is the filename, use the function Convert>filename-filename
If it is the really the TITLE, I would tidy up the data and split the title into title and artist with an action of the type "Guess value".
If it is still the filename and you have not got any data in the tag fields, I would import that data first into the tag fields with Convert>Filename-Tag and then write a new filename with Convert>Tag-Filename.
Also, you could see this thread: