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In this paper, a TiBN nano-powder was synthesized by boronizing sintering method to form a solid solution of B in TiN crystalline structure. TiBN powder exhibits a specific micro-nano composite structure composed of TiBN crystals and an amorphous nanometer-sized layer. The amorphous structure is mostly distributed along particle boundaries with a minimum thickness of 2 nm. TiBN powder shows combined ceramic and metallic properties, and its electrical resistivity is 2.986×10-5 Ωm (better than that of TiN, TiC, TiCN, and TiB2). Solid dissolution of B into TiN increases number of valence bands and conduction bands near Fermi level, contributing to excellent electrical conductivity of TiBN powder. This proposed method can synthesize single-phase TiBN powder at 580 ℃ in 1 h, a synthesis temperature 500 ℃ lower than existing TiN synthesis temperatures. This TiBN powder synthesis route can be used to prepare bulk materials in engineering materials industry. In addition, it has attractive research value and broad application prospects in photovoltaic cells and energy storage collector applications including lithium batteries, supercapacitors, and fuel cells.