688
For Ti6Al4V , post heat-treatment is typically performed within the + region , which can control the morphology and size of the without significantly influencing the prior-grain size .
 material: Ti6Al4V; manufacturing process: post heat-treatment; concept or principle: morphology
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 material: Ti6Al4V; manufacturing process: post heat-treatment; concept or principle: morphology