The invention provides a method for processing crystal patterns of a titanium product. The method comprises the following steps of 1, carrying out heat treatment on the titanium product under a vacuumcondition; 2, grinding the titanium product subjected to heat treatment; and 3, carrying out acid pickling on the ground titanium product so as to obtain the titanium product with the crystal patterns. The method has the following effects that (1) the method comprises the three steps of heat treatment, grinding and acid pickling, the process steps are simplified, and industrial production is facilitated; (2) unusually coarse and big titanium crystal grains (the grain size can reach 1-5 mm) are obtained through heat treatment firstly, and then crystal boundaries are corroded through grinding and acid pickling processes, so that the crystal boundaries among the grains are clear, the effect visible to the naked eyes is achieved, the crystal pattern effect of the metal luster can be seen by naked eyes, and the product yield is high; and (3) the process parameters in the machining process are convenient to control, in addition, reagents are easy to obtain, and the processing cost is low.