[en] Irradiated Hf¹⁰B₂ was studied as a function of the annealing temperature up to 1100 degree C, utilizing the Time Differential Perturbed Angular Correlation Studies of Radiation Damage method. Three different sets of frequencies were needed to fit the data at all temperatures having the same V_zz and η. V¹=13. l*10¹⁷ V/cm² (η=0.26) is attributed to the hexagonal symmetry of the lattice while V_zz²=21.9x10*¹⁷ and V/cm²=13.1x10¹⁷ V/cm² are due to the damage induced by the neutron irradiation. The Electric Field Gradients fractions (f¹-f³) changed during the degrees isochronal annealing were f¹ increases from 20% at 100 degrees C to 35% at 1100 degrees C and f² decreases from 70% to 55% while f³ remains constant. 10%, The c/a ratio as function of pressure shows a linear reduction tendency. Fitting the data with the B-M equation to determine the Bo as 232±13 GPa with B^o' fixed at 4. There is no indication for phase transition in the measured reign