The ab initio quasirelativistic approach developed specifically for the calculation of spectral parameters of highly charged ions has been used to determine transition data for the Tc-like tungsten ion W 31+ . This is the final paper of our studies examining spectroscopic properties of the tungsten ions with open 4d shell in the ground state. The configuration interaction method has been utilized to include electron correlation effects. The relativistic effects have been taken into account in the Breit-Pauli approximation. Level energies, their radiative lifetimes tau, and Lande g-factors have been determined for the ground configuration 4p64d' and two excited configurations, 4p54d$ and 4p64d64f. The radiative transition wavelengths lambda and emission transition probabilities A for the electric dipole, electric quadrupole, electric octupole, magnetic dipole, and magnetic quadrupole transitions among the fine-structure levels of these configurations have been computed and analyzed. The uncertainties of produced spectroscopic parameters have been evaluated.