  Nuclear mass measurements of isotopes are key to improving our understanding
of nuclear structure across the chart of nuclides, in particular for the
determination of the appearance or disappearance of nuclear shell closures. We
present high-precision mass measurements of neutron-rich Ca, Ti and V isotopes
performed at the TITAN and LEBIT facilities. These measurements were made using
the TITAN multiple-reflection time-of-flight mass spectrometer (MR-ToF-MS) and
the LEBIT 9.4T Penning trap mass spectrometer. In total, 13 masses were
measured, eight of which represent increases in precision over previous
measurements. These measurements refine trends in the mass surface around $N =
32$ and $N = 34$, and support the disappearance of the $N = 32$ shell closure
with increasing proton number. Additionally, our data does not support the
presence of a shell closure at $N = 34$.
