A titulus is a linear bank and ditch opposite a gateway of a Roman Camp, providing extra defence at the gate.

They served the same purpose as claviculae, although seem to have been more common. 45% of camps in Britain exhibit evidence for tituli as opposed to only 9% with evidence for claviculae but that could be partly because the ditch often did not extend with the clavicula, so archaeological cropmark evidence is less likely to be seen. Very rarely, a clavicula and a titulus were used at the same gate.