<p>In present study, Zr-based bulk metallic glasses (BMGs) of compositions Zr₆₀Ti₅Cu₂₀Fe₅Al₁₀ and Zr₆₀Nb₅Cu₂₀Fe₅Al₁₀ were prepared using a copper mold suction casting method. The X-ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed that both BGMs in as-cast condition exhibit a fully amorphous structure. The differential scanning calorimetry (DSC) was employed to investigate the thermal stability and crystallization kinetics under non-isothermal conditions. The Kissinger analysis revealed that the glass transition activation energy is higher than the crystallization activation energy for both as-cast BMGs. Results showed that the addition of Nb improves the glass-forming ability (GFA) and thermal stability compared to Ti, as indicated by higher <i>T</i>_rg, <i>γ</i>, and PHSS parameters. The temperature and field-dependent magnetic measurements were carried out to examine the magnetic behavior of the as-cast BMGs. Magnetic results revealed that the Ti-containing BMG exhibited paramagnetic behavior. In contrast, the Nb-containing BMG displayed soft ferromagnetic behavior, which is attributed to enhanced exchange coupling among Fe atoms within the amorphous matrix.</p>