Ni(OH)(2) is recognized to be a promising material to detect hydrogen peroxide (H2O2), however, the fabrication method and electrocatalytic performances of suitable Ni(OH)(2) structures are still in progress. In this work, we present a facile approach to in situ fabricate highly accessible Ni(OH)(2)/K-Ti-O composites by hydrothermally treating NiTi foil in 5 M KOH solution. Based on systemic characterizations, the Ni(OH)(2) appears nanoflakes, meanwhile the K-Ti-O shows nanowires in shape, which are randomly mixed together. Serving as a binder-free non-enzymatic sensor, the Ni(OH)(2)/K-Ti-O/NiTi foil electrode exhibits remarkable electrocatalytic activity towards hydrogen peroxide (H2O2) with a high sensitivity of 4278 mu mM(-1) cm(-2) from 5 mu M to 1 mM, and 1522 mu A mM(-1) cm(-2) from 1 mM to 5 mM. Further, the electrode can be demonstrated to have excellent selectivity, fast response, and long-term stability towards the H2O2 detection. It is found that the Ni(OH)(2) plays a critical role with the synergistic effects of K-Ti-O. All our impressive performances indicate that the Ni(OH)(2)/K-Ti-O composites are promising electrode materials for non-enzymatic H2O2 sensors.