Kid Flash, Aqualad and Robin in "The Thousand-and-One Dooms of Mr. Twister"
Teen Titans tryout. Unofficial first appearance of the Teen Titans though it is in Brave and the Bold (Vol 1) #60 that they are officially named and their roster established.
First Appearance of Mister Twister (Bromwell Stikk)
*The teenagers of the town Hatton Corners enlist the aid of Robin, Kid Flash and Aqualad, the junior partners of some of the Justice League members, as arbitrators in their disputes with the town's adult population. When the three young heroes arrive and meet, they discover the entire youth population has been kidnapped by a fanatic calling himself Mister Twister, the last descendant of one of the founders of Hatton Corners, Mister Twister possesses bizarre powers over weather effects by through a magical Indian medicine staff and uses them to blackmail the town officials. While he manages to put Kid Flash and Aqualad out of action, Mister Twister is defeated by Robin and the youth of Hatton Corners are freed and reunited with their parents. *Source Official Teen Titans Index #1 - Published by ICG