I may be beginning to understand.
On MB “title” is not natural language with the common meaning.
Rather it is a technical term, jargon, where the common meaning has been replaced with a meaning that suits the needs of an encyclopedia where metadata needs to be created and related.
That which might be seen as part of a album or single title in common language may have been categorised on MusicBrainz as the name of a series, version, label, performer, composer, … .
A MB title will be created out of these and other components in a way that (hopefully) optimises the utility of the created title in the database.
This sounds complex and not user friendly.
However in actual use it works very well.
And minor tweaks to the system continue to improve the user experience.
A new user will be able to recognise the specific album or single a MusicBrainz title is referring to.
However to construct a MusicBranz title takes training and expertise.