Selecting the correct material is vital for performance. For circular saw blades, look for C4 grade tungsten carbide tips which offer the best balance between hardness and impact resistance. For the blade body, 65Mn spring steel or 75Cr1 alloy steel is preferred to prevent warping under high heat. Regarding tooth configuration, use ATB (Alternate Top Bevel) for clean cross-cutting and Flat Top (FTG) for fast ripping. Ensure the hook angle is between 15° to 20° for softwoods and 5° to 10° for hardwoods to optimize cutting efficiency.