WARNING: The following contains spoilers for Titans, streaming now on DC Universe.
Season 1 of Titans introduced on Hank and Dawn, aka Hawk and Dove, as lovers who tried to move past a triangle with Dick Grayson/Robin and also had a dark history of their own. Season 2 revealed this had a lot to do with the deaths of Jericho and Aqualad, which caused the initial disbanding of the group.
In fact, things got so rocky as Dick tried to put the family back together that when Robin's true role in Jericho's death came to light, Hawk and Dove separated, seemingly for good. However, by the season's end, they returned to the tower for another stint. After defeating Deathstroke, though, it's in the show's best interest to keep this couple apart permanently.
At this point, there's simply nothing left to explore there. The Robin love triangle is gone as Dick's now scouting the future for the group as Nightwing, but more so, Dawn is over the days of old. She begged Hank to stay but he took off, leaving San Francisco behind for cage fights and one-night stands, all while Dawn tried to find Rachel and Beast Boy with Starfire and Donna Troy. This paints a one-sided picture of a genuine hero and an outright narcissist, and while Season 2 ends with them back at Titans Tower, Dawn makes it clear it's only as friends. Duty comes first and while they'll be teammates, they don't have a romantic future together.
This is a smart direction as it removes the kind of teen drama that's more commonplace with The CW series. It also gives the duo more agency moving forward; the crime-fighters have prominent roles as mentors now, not just filling in at the tower. Bruce Wayne basically endorsed them and Nightwing needs senior people on the job so the responsibility is already there.
With Beast Boy, Jericho, Rose, Conner Kent/Superboy and Raven (once she returns from Themyscira) as young charges, they'll need to be taught properly. Leaders have to set an example, so this dysfunctional on-again/off-again relationship will make Hawk and Dove seem immature and unstable. Plus, it'll take the spotlight away from the younger, more interesting heroes.
Simply put, we've had enough of this dance in the limelight. They tried and failed to chart a life together so dragging it out once more would feel like flogging a dead horse. The will-they/won't-they lasted for two seasons, but as much as Hank and Dawn did have great chemistry, the ship has sailed and now, it's time for Hawk and Dove to evolve into something more than just street-brawlers.
It's up to them to usher in the next age of heroes, and by staying separate, it'll also augur well for their own mental health. They drove each other insane at quite a few intervals, so this would freshen up their dynamic and allow them to grow as heroes, too. Having them reunite would feel regressive and like the show's afraid of letting them be their own characters instead of a power couple. This severance fuels more of their own identity and doesn't walk back the progress Dove made at the tower, comfortable in her own skin as a leader of a school, and more so, as someone who's truly emancipated.
Streaming now on DC Universe, Titans Season 2 stars Brenton Thwaites as Dick Grayson, Anna Diop as Kory Anders, Teagan Croft as Rachel Roth, Ryan Potter as Garfield Logan, Curran Walters as Jason Todd and Conor Leslie as Donna Troy, with Minka Kelly as Dawn Granger, Alan Ritchson as Hank Hall, Joshua Orpin as Superboy, Chelsea Zhang as Rose Wilson, Chella Man as Jericho, Drew Van Acker as Aqualad, Esai Morales as Deathstroke and Iain Glen as Bruce Wayne.