Tales of the Teen Titans #57 (1985)

The End Of Cyborg
At Titans Tower, Dick, Donna, and Kory recuperate from their battle with the Fearsome Five with Gar and Joe, while at S.T.A.R., Victor Stone goes through recuperative physical therapy with Dr. Sarah Charles due to his robotic parts being replaced with plastic. The Fearsome Five recruits the sorceress Jinx to their cause, but are unable to free Nuetron from his confining radiation-proof capsule without aid. Days later, having heard nothing from Cyborg, the Titans learn of his operation from his grandparents, while the Fearsome Five decide to abduct Dr. Jenet Klyburn to help them free Nuetron. Both groups converge on the S.T.A.R. facility, but the super-villains arrive first and kidnap both Dr. Klyburn and Victor Stone, who they don’t recognize as the former Cyborg. Back at the criminal’s headquarters, Victor manages to rig Neutron’s capsule to explode, so that he and Jenet Klyburn can escape in the confusion. As they are leaving, Victor collapseswhen his body begins to reject its new polymer replacement parts. The next morning, Psimon’s image appears at a hastily convened mayoral press conference to demand the surrender of New York City to the Fearsome Five.
Release Date: 1985