A universal framework that captures solidificationSolidification behavior under all processingProcessing conditions and processes is critical for accelerating alloy designAlloy design and property optimizationOptimization. A Solute Trapping Map (STM)Solute Trapping Map (STM) was developed that uses a novel metric, percent solute trapped, to link solute partitioning with growth kinetics. The STM integrates data from a spectrum of solidification processes, ranging from slow-solidification methods such as brazing, to rapid solidificationRapid solidification like atomization, laser powder bed fusion (LPBF)Laser Powder Bed Fusion (LPBF), andSelective laser melting selective laser meltingMelting (SLM), as well as partitionless solidificationPartitionless Solidification via pulsed laser melting (PLM). The STM in this work was developed for Al-(3–12)Si and Al-10Si-0.4Sc alloy. The STM defines four regimes of solidificationSolidification: Near Equilibrium, Lower-Quasi rapid solidificationRapid solidification (RS), Higher-Quasi RS, and Absolute Partitionless. Transition to Higher-Quasi RS occurs at ~10% solute trapping ( \(V \sim 0.02 m/s, \Delta T \sim 156 K\) ), accompanied by a dendrite orientation shift from ⟨100⟩ to ⟨320⟩. STM delineates impurity solute Sc trapping trends and correlates solute trapping with microhardness. Complete Sc trapping is predicted at ~10 m/s suppressing undesirable AlSc2Si2 intermetallicIntermetallics.