The catalytic activity of (P)NiMo/Ti-HMS and (P)NiW/Ti-HMS catalysts in the reaction of hydrogenation of naphthalene is studied. The hydrogenation activity of the tungsten based catalysts is superior to that of the conventional alumina supported catalysts. The molybdenum based catalysts manifest mild hydrogenation activity. The high catalytic activity is attributed to the high surface area and pore volume of the support.