Abstract: The existing buoys are limited by high maintenance costs, short operation cycle and service life, and the problem of orientation or built-in magnetic compass sensors being affected by buoy magnetic fields. To solve this problem, the MF14004 buoy of the Chinese ocean buoy observing network and an all-titanium ocean data buoy are used to synchronously observe the same sea area, and the observation data of major parameters are compared. The results show that the observations of the all-titanium ocean data buoy are relatively accurate and effective, more accurate than the observation results of MF14004 buoy. The nonmagnetic and hydrodynamic characteristics can improve the observation quality of wave direction and flow direction. The design and manufacturing of the all-titanium ocean buoy have broken through the bottleneck of new material buoy technology, the results of sea trials, monitoring applications, and economic benefits indicate that it has the stability and feasibility of long-term, continuous, and all-weather automatic ocean data observation. The design, sea trial, and application of the all- titanium ocean data buoy are the first of their kind in China. Promotion and application of this buoy is the development trend of high-quality ocean data buoy observation technology.