Results are presented from a one-neutron knockout reaction at relativistic energies on ⁵⁶Ti using the GSI FRS as a two-stage magnetic spectrometer and the MINIBALL array for gamma-ray detection. Inclusive and exclusive longitudinal momentum distributions and cross-sections were measured enabling the determination of the orbital angular momentum of the populated states. First-time observation of the 955(6) keV ν p⁻¹_3/2- hole state in ⁵⁵Ti is reported. The measured data for the first time proves that the ground state of  ⁵⁵Ti  is a 1/2⁻ state, in agreement with shell-model calculations using the GXPF1A interaction that predict a sizable N =34 gap in ⁵⁴Ca.