To look for the signature of coherent multibody fusion, experiments of D-beam implantation were carried out using a highly preloaded TiDx (x = 1.4) target and a counter telescope of a E-E charged-particle spectrometer. As a result of the experiments, two unique particles were repeatedly observed, namely, 3He (4.75 MeV) and triton (4.75 MeV) from 3D fusion proposed by a new class of fusion theory in solids. The two unique charged particles were identified as products of the reaction channel of 3D to t + 3He + 9.5 MeV by the combinational analyses of one- and two-dimensional data. The experimentally obtained 3D fusion rate was of the order of 103 fusions/s, a surprisingly large value, which was enhanced ~1026 times compared with the traditional theory of random (noncoherent) D-D reaction and its sequential D-D-D reaction process.