This topic existed before already, but got closed.

However, we still need a better Title Case option that doesn’t capitalize prepositions or articles, unless they’re the start word.

While each style guide might have some slight variation, there are enough commonalities that could be applied to how users expect Title Case to work.

One huge use case from the comments is to use the Title Case text style in components like buttons. Doing it manually without the case set is time consuming and open to errors.