Data corresponding to the article 'Quasiparticle Fermi surfaces of niobium and niobium-titanium alloys at high pressure'. File description: Nb_dos_full.txt - Density of states of bulk Nb corresponding to Fig. 1 Nb_dos_orbital.txt - Orbital resolved density of states of Nb corresponding to Fig. 1 NbTi_dos_orbital.txt - Orbital resolved density of states of NbTi corresponding to Fig. 2 NbTi_dos_u.txt - Interacting density of states of NbTi corresponding to Fig. 3 NbTi_sigma_iw.txt - Self energy as function of Matsubara frequencies of NbTi corresponding to Fig. 4 NbTi_sigma_iw.txt - Self energy as function of energy of NbTi corresponding to Fig. 4 NbTi_meff_u.txt - Pressure dependence of effective mass for different interaction strengths corresponding to Fig. 5 NbTi_meff_temp.txt - Pressure dependence of effective mass for different temperatures corresponding to Fig. 5 Nb_fermi_0GPa.txt - Fermi surface of bulk Nb at 0 GPa coresponding to Fig. 6 Nb_fermi_50GPa.txt - Fermi surface of bulk Nb at 50 GPa coresponding to Fig. 6 Nb_fermi_100GPa.txt - Fermi surface of bulk Nb at 100 GPa coresponding to Fig. 6 Nb_fermi_150GPa.txt - Fermi surface of bulk Nb at 150 GPa coresponding to Fig. 6 NbTi_fermi_0GPa.txt - Fermi surface of NbTi at 0 GPa coresponding to Fig. 6 NbTi_fermi_50GPa.txt - Fermi surface of NbTi at 50 GPa coresponding to Fig. 6 NbTi_fermi_100GPa.txt - Fermi surface of NbTi at 100 GPa coresponding to Fig. 6 NbTi_fermi_150GPa.txt - Fermi surface of NbTi at 150 GPa coresponding to Fig. 6 NbTi_u_fermi_0GPa.txt - Interacting Fermi surface of NbTi at 0 GPa coresponding to Fig. 6 NbTi_u_fermi_50GPa.txt - Interacting Fermi surface of NbTi at 50 GPa coresponding to Fig. 6 NbTi_u_fermi_100GPa.txt - Interacting Fermi surface of NbTi at 100 GPa coresponding to Fig. 6 NbTi_u_fermi_150GPa.txt - Interacting Fermi surface of NbTi at 150 GPa coresponding to Fig. 6