The igniting strength of K₁K is modified by the addition of nano-TiO₂. The impulse measurement and the lead disc test are employed to evaluate the effectiveness of the modification. When the dosage of ignition mixture is reduced to half of the minimum usage in common detonator, K₁K with nano-TiO₂ can still ignite detonator while K₁K cannot. The results show that nano-TiO₂ can increase igniting strength of K₁K and the igniting strength increases with the content of nano-TiO₂.