Directional Solidification (DS) is an advanced casting process that controls the direction and rate of metal solidification to form a columnar grain structure, thereby significantly improving the mechanical properties of the material. The process first melts the alloy and pours it into a ceramic mold, and then through bottom-up cooling, the metal gradually solidifies from bottom to top, forming grains aligned in the direction of heat extraction. Directionally solidified castings perform well in high-temperature environments and are widely used in the manufacturing of critical components such as turbine blades and guide vanes in aerospace, power generation, automotive and petrochemical industries. Benefits include improved creep resistance, tensile strength and fatigue life, and reduced casting defects.