1810
Increasing the scanning speed from 300 to 700 mm/s resulted in finer grains , irregular grain morphology , and a weaker grain texture , which enhanced the strength and ductility .
 scanning speed, grains, grain, grain, strength, ductility
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 scanning speed, grains, grain, grain, strength, ductility