In 1954 during the development of the ICBM Atlas missile, the USAF contacted another series of companies so that in the event that any of the main components failed, they would have a resource ready so that development would not be paralyzed. In 1955, despite the successful development of the Atlas missile, Martin was commissioned to develop a new ICBM missile as the US defense policy could not be based on the existence of a single type of missile. In this way, the SM-68A/HGM-25A Titan I emerged, the world’s first multistage ICBM missile, which despite only remaining operational during three years, paved the way for future developments as Titan II ICBM, Titan III satellite launch rocket and Saturn V moon rocket.

TITAN I gallery and more info


Información adicional

Ficha Completa
Country of origin

United States


Martin Marietta


Intercontinental ballistic missile

Entered service


Missile/bomb dimensions, (length x diameter)

31.00 x 3.10 (max) meters

Missile/bomb weight

105,140 kg

Missile speed

Mach 20.2 (24,750 km/h)

Missile range

10,395 km

Guidance system

Radio-inertial command

Warhead, (explosive charge)

Type: W-38 or W-49 thermonuclear

Yield, (maximum)

W.38 warhead: 3.75 Megatons – W.49 warhead: 1.44 Megatons

C.E.P., (circular error probability)

800 meters


Total 163: 62 testing missiles + 101 operational