The Roman god of fire and metalworking who was married to Venus was Vulcan.
Vulcan, called Hephaestus by the Greeks, ruled over fire, furnaces, smithing, and metalwork. His forge was imagined beneath a volcano, where he crafted divine weapons, armor, jewelry, and other marvelous objects for the gods. Roman tradition connected his worship with the dangerous and useful power of fire.
Venus was the goddess of love and beauty, so her marriage to Vulcan paired physical attractiveness with the rough, soot-covered craftsman of the forge. Mythic traditions often portray the marriage as unhappy, especially through stories of Venus’s affair with Mars. That episode explains why Mars—not Vulcan—is sometimes mistakenly remembered as Venus’s husband.
Vulcan’s major Roman festival, the Vulcanalia, was held on August 23. Worshippers used fires and offerings to seek protection from destructive flames, a reminder that Roman religion treated fire as both essential technology and a serious threat.