The Teen Titans were popular enough to be awarded their own series, with issue #1 cover-dated February 1966. The early issues were noted for their artwork by Nick Cardy. While Green Arrow's ward Speedy would naturally join, the series later introduced entirely new teenaged heroes, notably Lilith and The Hawk and the Dove.
The series' tone was often torn between the freewheeling excitement of the 1960s, and its darker side as keyed by the Vietnam War and the protests thereof. One memorable storyline beginning with #25 (February 1970) put the Titans in the middle of the accidental death of a peace activist, leading them to reconsider their means and goals, and leading to the temporary departure of Robin. The theme of teenagers learning to take on adult responsibilities was a common theme of the series.
The series' popularity flagged heading into the 1970s, and it went on hiatus as of #43 (February 1973).
The brainchild of writer Marv Wolfman and artist George P�rez, it's been widely speculated that the book was DC's answer to the increasingly popular X-Men from Marvel Comics, and indeed both books involved a group of young adult heroes from disparate backgrounds whose internal conflicts were as much a part of the book as their combat against villains. In any event, both books were instrumental in moving mainstream comics in a more character-driven direction. Much as X-Men made a fan favorite out of John Byrne, The New Teen Titans did the same for P�rez.
Even the villains' motivations could be complex, as in the case of Deathstroke the Terminator, a mercenary who took a contract on the Titans to fulfill a job his son was unable to complete. This led to the Titans' most complex adventure, in which a psychopathic girl named Terra infiltrated the Titans in order to destroy them. This story also included the original Robin, Dick Grayson, adopting the identity Nightwing.
Other notable stories included Robin unearthing Wonder Girl's true identity (#38), and Wonder Girl's marriage (#50, also noteworthy for being a rare superhero wedding where a fight didn't break out).
The series underwent some numbering confusion when DC moved some of its more popular books to from the newsstand to the direct distribution market (to comic book specialty stores) in 1984. The New Teen Titans became Tales of the Teen Titans for a year, while a new book named The New Teen Titans was launched with a new #1. The former book began reprinting the latter's stories for the newsstand a year later, and ran to #91, but the new stories were in the direct market book.
P�rex left the book after #5 of the second series, and the series seemingly went into a tailspin (at some point Wolfman apparently suffered from writer's block, and other writers chipped in from time to time). Jos� Luis Garcia Lopez followed P�rez, and Eduardo Barreto contributed a lengthy run. Then P�rez returned with #50 (the book again being renamed, this time to The New Titans, the characters effectively no longer being teens) to tell another origin story for Wonder Girl (her previous link to Wonder Woman having been revered due to retcons in Crisis on Infinite Earths), resulting in her being renamed Troia. P�rez this time hung on to #61.
Following this, the book introduced a number of characters, put other through some radical changes, and though it ran for another 7 years, the group which appeared in the final issue, #130 (February 1996), bore little resemblance to the one which had anchored DC's line-up in the early 1980s.
The earlier team was revived in a 3-issue miniseries, JLA/Titans, featuring nearly everyone who had ever been a Titan. This led into The Titans #1 (March 1999), with a group consisting of some previous members and a number of new young adult heroes. This series lasted to #50 (2002).
Yet another Teen Titans series was launched in 2003, again featuring a mix of previous and new members, some of whom had previously been part of Young Justice.