That being said, even the original Teen Titans broke its 'no secret identities' edict from time to time and used its characters' real names, be it subtly or overtly.
This rule was far laxer in the New Teen Titans spinoff and is virtually non-existent in Teen Titans Go!. They were simply Robin, Starfire, Cyborg, Raven and Beast Boy. They weren't Dick Grayson, Koriand'r, Victor Stone, Rachel Roth and Garfield Logan. In fact, they were even often depicted as sleeping in their costumes. When the team went down to the local pizza parlor for a slice or to the video store to rent a movie, they did so in costume. As such, Teen Titans rarely explored the idea of its main characters having secret identities, and almost never used their real names.