By conventional melt-quenching, we have prepared novel optical amorphous borate-based glass sample series of B2O3-ZnO-TiO2 host materials to investigate their optical properties and microstructure. Following the successful preparation, the density rho and molar volume V-m of the samples were calcu- lated by the Archimedes principle. In addition, microstructural and optical properties of the materials were determined by the experimental techniques, such as the Fourier transform infrared, Raman, X-ray diffraction, scanning electron microscopy, and UV-vis absorption techniques. The microstructure of the prepared borate-based optical glass materials shows two crystalline phases for various glass compositions, such as titanium oxide TiO2 , and zinc borate Zn-3(BO3)(2). Finally, the direct energy band gaps were 3.5, 3.55, and 3.6 eV for the xZnO contents (x = 45, 50, and 55 mol%), respectively.