<p>The microstructure, mechanical performance, tribological behavior, and corrosion resistance of a vacuum arc-melted Ti₃₀Cr₂₀Fe₂₀Mo₁₅Zr₁₀Ta₅ compositionally complex alloy (CCA) were investigated. Phase characterization was carried out using X-ray diffraction (XRD) and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM–EDX). The XRD results revealed that the microstructure of the Ti₃₀Cr₂₀Fe₂₀Mo₁₅Zr₁₀Ta₅ CCA is primarily composed of a body-centered cubic (BCC) solid solution. In addition, several intermetallic phases were identified, including (Cr_0.4Fe_0.6)₂Zr, (Mo₂Ti)_0.66, and Fe₂(Ta_0.5Ti_0.5), highlighting the structural complexity of the alloy and its contribution to the resulting properties. The cast CCA exhibited promising mechanical and tribological properties, with a microhardness of 847.5 ± 10 HV, a fracture toughness of 3.07 MPa·m^0.5, a Young’s modulus of 131.29&#xa0;GPa, and a weight loss of 0.16&#xa0;g during wear testing, indicating its potential for reliable service performance. Regarding corrosion behavior in saline solution, the corrosion rate significantly decreased from 127.9&#xa0;μm/y in the absence of hydroxyapatite (HA) to 7.1&#xa0;μm/y at an HA concentration of 3&#xa0;g/L. Similarly, in simulated body fluid (SBF), the corrosion rate initially decreased from 119.5 to 4.04 μm/y at 2&#xa0;g/L HA, then increased to 103&#xa0;μm/y at 3&#xa0;g/L HA. Thus, the HA-modified Ti₃₀Cr₂₀Fe₂₀Mo₁₅Zr₁₀Ta₅ CCA demonstrates promising potential as a future biomaterial due to its favorable mechanical properties and tunable electrochemical stability.</p>