  Investigations into the microwave surface impedance of superconducting
resonators have led to the development of single photon counters that rely on
kinetic inductance for their operation. While concurrent progress in additive
manufacturing, `3D printing', opens up a previously inaccessible design space
for waveguide resonators. In this manuscript, we present results from the first
synthesis of these two technologies in a titanium, aluminum, vanadium
(Ti-6Al-4V) superconducting radio frequency resonator which exploits a design
unattainable through conventional fabrication means. We find that Ti-6Al-4V has
two distinct superconducting transition temperatures observable in heat
capacity measurements. The higher transition temperature is in agreement with
DC resistance measurements. While the lower transition temperature, not
previously known in literature, is consistent with the observed temperature
dependence of the superconducting microwave surface impedance. From the surface
reactance, we extract a London penetration depth of $8\pm3{\mu}$m - roughly an
order of magnitude larger than other titanium alloys and several orders of
magnitude larger than other conventional elemental superconductors. This large
London penetration depth suggests that Ti-6Al-4V may be a suitable material for
high kinetic inductance applications such as single photon counting or
parametric amplification used in quantum computing.
