 This paper investigated the generation of ultra-broadband 0.1 to 30 THZ, terahertz, radiation, carrying fractional, integer, orbital angular momentums, OAMs, through the interaction of two color, 0 and 2020, laser fields with air in a moderate pump intensity regime, 20 TWCM2, I pump less than 50 TWCM2, 2-4 wave mixing, FWM, processes, 0 plus, 0, 2-0 THZ, and 2-0, 0, 0 THZ, were responsible for THZ generation. These processes could generate two THZ pulses, which interfered with each other, and resulted in THZ interference vortex beams. The generation probability from the first FWM process increased, while that of the second process decreased in the positive frequency region over distance. This was mainly due to the combined effect of phase mismatch, and the blue shift of the THZ center frequency. At longer distances, THZ fractional vortex beams, FVBs, integer vortex beams, IVB. This article was authored by Heng Geng Wang, Shixiong Xu, Yu Yu Chen, and others. We are article.tv, links in the description below.