Not sure what content-management system
The Atlantic uses, but WordPress (or at least its popular SEO plugins) allow you to specify different values for <title> and article <h1> headlines. A lot of news orgs are now savvy enough to use varied titles for different formats. For example, this week's New Yorker print issue has a story titled, "Behind the Wall", which works in print because your eyeball can scan the article's entire presentation and see the headline in context with a photo and subhed "As the U.S. abandons diplomacy, an Ambassador resigns in protests".
In the online version, the story's title is "The Diplomat Who Quit the Trump Administration", and the subhed (which is also the <meta> description) contains proper nouns: "For John Feeley, the Ambassador to Panama, moral failings at home seemed to compound tactical failings abroad"
https://www.newyorker.com/magazine/2018/05/28/the-diplomat-w...