[Feature Request]: `modify_title()`: rename `title` to `element`

### Feature description

Rename `title` to `element` and change the default. This has to follow our renaming conventions: (i) introduce a new one + soft deprecate the old one and (ii) remove old one after some time.

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct.

### Contribution Guidelines

- [x] I agree to follow this project's Contribution Guidelines.

### Security Policy

- [x] I agree to follow this project's Security Policy.

Start by locating `modify_title()` and its call sites, then review the project's renaming conventions for introducing a replacement and soft-deprecating the old name. Confirm how the default is currently defined and document the compatibility and eventual removal expectations; done means the new `element` name and default work while the old `title` name remains supported during deprecation.

Written by the indexing model from the issue text.