Owing to low-temperature deposition condition and high deposition rate, cold spraying (CS) offers remarkable advantages in manufacturing a wide variety of composite coatings and thick metallic deposits including metal matrix composites (MMC) from phisically blended powders. One of the challenges of spraying composite coatings using CS is the deviation of coatings composition from the blended feedstock powder composition. Ni-Ti system including NiTi alloy is well known and used for its shape memory and superelastic properties which make the Ni-Ti system of particular interest. In this work, CS additive manufacturing of composite Ni-Ti coatings and formation of intermetallics from post spray heat-treatment (PSHT) were investigated. To address the coating composition changes from feedstock powder and its influence on the phase evolusion during PSHT, physically blended gas atomized Ni and Ti powders mixtures with equivalent atomic ratio, volume ratio and an optimized ratio based on theoretical approach (respectively with 55, 61.3 and 75.3 % at Ni and balanced Ti ratios) were sprayed on titanium and stainless steel substrates. High-density composite coatings with well dispersed Ni and Ti particles were achieved. The chemical compositions of the composite coatings were evaluated using EDS analysis. The latter revealed that coatings with 10.5, 35.2 and 53 at. % Ni (and with balanced Ti ratios) were obtained from the three powder mixtures, validating the approach to design optimized powder composition for the sought coating composition. PSHT were conducted at 900 °C for 60 minutes and comparative studies of the intermetallic compound (IMC) formations were carried out. Microstructural investigation showed that all three equilibrium intermetallics of binary Ni-Ti phase diagram including Ni₃Ti, Ti₂Ni and NiTi phases formed at two Ni rich composite coatings while the other coating appeared to have only Ti₂Ni  phase. Keywords: Cold Spray , Composite coating, Ni-Ti, Heat treatment, Intermetallics