Can William Afton Die?

Unable to escape, the endoskeletons dragged him into a nearby furnace along with them, killing him for good. With Afton dead and the animatronics destroyed, the souls of the children can finally fade away.

Is William Afton immortal?

"William Afton's eyes scanned the blue prints. Looking for any possible flaw. It was perfect. ... The next morning, William Afton, an hour-old, extremely advanced robot powered by nothing other than clean fuel and the very soul of Afton himself woke up, having just unlocked the secret to Immortality after all these years."

Is William Afton afraid of death?

William wearing a deadly springlock suit is not necessarily inconsistent with his fear of death. William trusted in his own competency to wear the suit. Both times it went off were because of Ella ('Charlie') causing it to malfunction. William had cited that he wore the suit many times before, without incident.