You would need two different app links and you would data map the different titles in those separate app link. The source would be a constant and the destination would be title.
@joeyates23 got it! There is a dedicated āTitleā selection when creating mappings through an app link. On the Actions tab of the application builder, you can select the āCreate Mappingsā or āEdit Mappingsā for the app link and establish a title in addition to any other data mappings from the source to target app.