Pure resistance:
As the resistance in an RL circuit becomes large with respect to inductive reactance, the angle of lag gets smaller. The same thing happens if the inductive reactance gets small compared with the resistance. When R is many times greater than XL, whatever their actual magnitudes may be, the vector in RL plane lies almost on R axis, going east or to right. The RL phase angle is nearly zero. The current comes into the phase with voltage.
In the pure resistance, with no inductance at all, the current is precisely in the phase with the voltage. A pure resistance does not store any energy, as an inductive circuit does, but sends energy out as heat, light, electromagnetic waves, sound, or some other form that never comes back into circuit.
Figure-- In the circuit with only resistance, the current is in phase with the voltage.