Why not using the "phase" keyword...
The following code works fine.

#declare T1=texture {
 pigment {
  gradient x+y
  frequency 6
  color_map {
   [0.45 rgb <1,1,0>]
   [0.55 rgb <1,0,0>]
  }
 }
 finish {ambient 1}
}

#declare T2=texture {
 pigment {
  gradient z+y
  frequency 4
  color_map {
   [0.45 rgb <0,1,1>]
   [0.55 rgb <0,0,1>]
  }
 }
 finish {ambient 1}
}

sphere {
 0,1
 texture {
  radial

  triangle_wave
  texture_map {
   [0.4 T1]
   [0.6 T2]
  }
 }
}

camera {
 location <3,2,-4>
 look_at 0
}

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