Angular distributions of the $^{2}\mathrm{H}(d, d)^{2}\mathrm{H}$, $^{2}\mathrm{H}(d, p)^{3}\mathrm{H}$, and $^{2}\mathrm{H}(d, n)^{3}\mathrm{He}$ reactions at six incident energies in the 50-85 MeV range have been measured. The $^{2}\mathrm{H}(d, p)^{3}\mathrm{H}$ reaction data have been analyzed in terms of the plane-wave Born-approximation theory. A smooth cutoff in the partial wave expansion of the reaction matrix has been introduced to allow the suppression of the low angular momentum components. The calculated angular distributions obtained with a constant cutoff angular momentum ${l}_{\mathrm{co}}=3$ show reasonably good agreement with the experimental data in the whole 50-85 MeV energy range. This is consistent with the peripheral character of the reaction.NUCLEAR REACTIONS $^{2}\mathrm{H}(d, d)$, $^{2}\mathrm{H}(d, p)$, $^{2}\mathrm{H}(d, n)$, $E=50\ensuremath{-}85$ MeV; measured $\frac{d\ensuremath{\sigma}}{d\ensuremath{\Omega}}$; analysis in terms of PWBA with a smooth $l$ cutoff; deduced cutoff angular momenta.