|This article is about the Titan operator, for the dog see Princeps (Dog)|
A Princeps are members of the Collegia Titanica and the main operator of an Imperial Titan. They, together with two or more Moderatii are mentally linked with the Titan's "spirit". In effect, they are the Titan.
There are two other known ranks of Princeps, other than the basic:
- Princeps Majoris is a rank given to those who control entire battle groups of Titans, the equivalent of being a squad leader.
- Princeps Senioris is the leader of a Titan Legio. He is the master of all of that Legio's Titans.
A Princeps is trained at the Collegia Titanica. Unlike most of the Adeptus Mechanicus personnel, Princeps recruits are not only selected from the Forge Worlds' own civilians, but from anywhere the Mechanicus may find suitable candidates. This is because only the strongest of will can sustain a mind-link with the Titan's powerful spirit with their sanity intact, and the rarity of such specimens requires a larger selection pool.
- Camulos - of the Legio Mortis
- Enoch - of the Legio Astraman
- Ervin Hekate - of the Imperius Dictatio
- Esau Turnet - of the Legio Mortis
- Hagan Raal - Sanctus Venator, Warhound Scout Titan of the Legio Gryphonicus
- Indias Cavalerio - of the Legio Tempestus
- Kadashi - of the Legio Metalica
- Kel Sharaq - - of the Legio Tempestus
- Kurtiz Mannheim - of the Legio Metallica
- Malas Tiron - of the Legio Vulcanum
- Nishome Alvarek - of the Legio Ignatum
- Pietor Gearhart - of the Legio Invicta
- Rufus Aquila - of the Legio Mortis
- Sidarius Calvin - of the Legio Praetor
- 1: Warhammer 40,000 4th Edition Rulebook, Adeptus Mechanicus, p. 121
- 2: Imperial Armour Update 2002, pg. 45