What works better for using an aliphatic resin like Titebond - a coarse surface or a smooth surface. By coarse I mean a surface prepped with 80-120 grit paper. A smooth surface would be one prepped with 180/220 or finer.

TIA for your help.
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I doubt that the texture of the surfaces matter much. The fit is much more critical. Aliphatic resins actually penetrate the surfaces making the bond stronger than the actual wood assuming you have two good, flat mating surfaces pressing against each other. Cutting bad angles resulting in just the point of one surface against the other surface won't make a good bond.