Titanium and its alloys are the most commonly used metal implant materials due to their favorable characteristics such as biocompatibility, corrosion resistance, osseointegration and good mechanical properties. In this work, a commercial Ti–6Al–7Nb alloy was investigated, developed as alternative for a commercial Ti–6Al–4V alloy since vanadium was found to have an extremely bad effect on the neurological and respiratory body systems and was associated with Alzheimer's disease. Good corrosion resistance of the alloy, one of the basic prerequisites for biocompatibility, is based on the spontaneously formed titanium oxide film on the surface of the alloy. However, prolonged exposure to the aggressive bioenvironment of the human body fluids can lead to degradation of this protective film, and titanium alloys also show a high level of bioinertness. Therefore, in order to improve corrosion resistance, but also biocompatibility, bioactivity and the degree of osseointegration, the surface of titanium implants is modified by bioactive calcium phosphate (Ca-P) coatings, which was the topic of this work. The surface functionalization of the implant titanium alloy Ti-6Al-7Nb was performed by the electrochemical method of cathodic potential assisted deposition (electrodeposition). Potentiostatic electrodeposition conditions were determined based on cyclic voltammetry (CV) results. Electrochemical in vitro tests of unmodified and modified Ti-6Al-7Nb alloy surfaces were performed under real conditions of application in simulated saline, Hanks' solution. Corrosion parameters were determined by electrochemical impedance spectroscopy (EIS), Tafel method and linear polarization (Mansfeld method). Surface characterization of the alloy was performed by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) imaging technique and scanning electron microscopy (SEM). Based on the results, the influence of Ca-P deposit surface modification on the corrosion behavior of Ti-6Al-7Nb alloy was investigated and the conditions of the electrodeposition process were optimized.