目的 提高TC4/GH4169梯度过渡界面的元素分布均匀性，削弱界面效应，制备二维TC4/GH4169梯度结构。方法 利用激光增材制造技术，采用TC4-90%TC4+10%GH4169-GH4169的梯度过渡方式制备TC4/GH4169一维梯度材料，并在一维梯度的基础上设计二维梯度结构，制备TC4/GH4169二维梯度材料。利用场发射扫描电子显微镜对TC4/GH4169一维和二维梯度材料内的析出相以及各梯度过渡界面的组织形态进行分析，利用能谱仪对各梯度过渡界面处的元素分布进行分析。结果 一维梯度90%TC4+ 10%GH4169-GH4169界面相比于TC4-90%TC4+10%GH4169界面材料相互渗透程度更高。由于TC4内Ni元素的加入，在90%TC4+10%GH4169内生成了较多的呈交联网状分布的Ti2Ni析出相。二维梯度样件在水平方向的界面波动程度以及材料相互渗透程度相比于沉积方向更高，其中二维梯度水平方向TC4-90%TC4+10%GH4169界面两侧元素充分扩散，相比于一维梯度TC4-90%TC4+10%GH4169界面处的元素分布均匀性显著提高。结论 通过合适的梯度过渡方式以及二维梯度结构设计有效提高了梯度材料过渡界面的元素分布均匀性，显著削弱了界面效应，对梯度材料的制备具有指导意义。

This paper aims to improve the uniformity of element distribution at the TC4/GH4169 gradient transition interface, weaken the interface effect, and prepare a two-dimensional TC4/GH4169 gradient structure. Using laser additive manufacturing technology, the TC4/GH4169 one-dimensional gradient material is prepared by the gradient transition method of TC4-90wt.%TC4+10wt.%GH4169-GH4169, and the two-dimensional gradient structure is designed on the basis of the one-dimensional gradient to prepare TC4/GH4169 two-dimensional gradient material. The field emission scanning electron microscope is used to analyze the precipitates and the microstructure morphology of each gradient transition interface in the TC4/GH4169 gradient material, and the Energy Dispersive Spectrometer is used to analyze the element distribution at each gradient transition interface. The one-dimensional gradient 90wt.%TC4+10wt.%GH4169-GH4169 interface has a higher degree of interpenetration of materials than the TC4-90wt.%TC4+10wt.%GH4169 interface; due to the addition of Ni in TC4, more Ti2Ni precipitates with intersecting network distribution are formed in 90wt.%TC4+10wt.%GH4169; the degree of interface fluctuation and material interpenetration of the two-dimensional gradient sample in the horizontal direction is higher than that of the deposition direction. Among them, the two-dimensional gradient horizontal direction TC4-90wt.%TC4+10wt.%GH4169 interface is fully diffused on both sides of the interface. Compared with the one-dimensional gradient TC4-90wt.%TC4+ 10wt.%GH4169, the uniformity of element distribution at the interface is significantly improved. Appropriate gradient transition methods and two-dimensional gradient structure design can effectively improve the uniformity of element distribution at the transition interface of gradient materials, significantly weaken the interface effect, and have guiding significance for the preparation of gradient materials.