  In this paper the results of a beam test characterization campaign of 3D
trench silicon pixel sensors are presented. A time resolution in the order of
10 ps was measured both for non-irradiated and irradiated sensors up to a
fluence of $2.5 \cdot 10^{16}\,1\,MeV\, n_{eq}\,cm^{-2}$. This feature and a
detection efficiency close to $99\%$ make this sensors one of the best
candidates for 4D tracking detectors in High-Energy-Physics experiments.
